"Come on, Mathilda," Valerie teased. "It's Halloween."

"Not yet. A-And I told you, I have plans on Halloween!" she blurted out before the cheerleader used that as an excuse to try to make her do something then instead.

Valerie rolled her eyes. "Yeah, I know, going to see some movie with your little nerd friends. Are you going to show them what I've been teaching you?"

Matti's face turned bright red as Valerie gave one of the dildos stuck to the wall a pat, the very action seeming obscene to her, much less the implication. "N-No!" she squeaked.

"Hmm," Valerie snickered skeptically. "If you say so. Well, either way, it doesn't matter, because this isn't on Halloween, it's the weekend before. I thought we could do that instead of your usual lesson."

"Th-That'll still count?" Matti asked. As worried as she was about whatever it was Valerie had in mind, it would be nice to be able to avoid all this for a weekend, she had to admit. She'd already spent so much time writing humiliating lines and simulating blowjobs that, if she had the chance to get out of it, she would be glad to do so. But if Valerie was suggesting it, that meant it might be even worse in some way.

"If you behave yourself and do as you're told," Valerie said. That didn't ease Matti's mind at all, though she was curious. "All I need from you is a costume."

Valerie refused to give her any details, but Matti took that to mean that she could go with whatever she wanted for the costume. She wasn't going to turn down an excuse to go to the Halloween store, and it was a fun afternoon, wandering around, admiring the decorations and wishing she had a yard to put the animatronics in before looking through the costumes.

It was early enough that there were plenty of choices still. As soon as she saw it, however, she knew what she was going to get. It was perfect! It was, after all, what had started all of this. There were a few versions, but she was happy to splurge on the nicest one.

When she showed it to Valerie during their next 'lesson,' the girl raised an eyebrow, smirked. "Oh, I see," she said.

"Y-You didn't say it had to be a sexy costume or anything!" Matti pointed out defensively. "It's a costume! I did what you wanted."

"Yes, you did," Valerie patted her on the head condescendingly. "Wear it here next Saturday."

There was a part of Matti that almost felt bad as she put it on. She knew there was a part of this that was real, at least in some world, so wearing it as a costume seemed a little odd now. Not to mention that, technically, she could have probably bought most of it at a regular clothes store and saved some money.

Still, there was something different about pulling it all out of the package, knowing it all went together exactly right. She smiled nervously at the mirror as she straightened her gray skirt, adjusted the white button-up tucked into it, tightened the yellow and black striped tie. She hadn't been quite sure about what shoes to wear, since she didn't know what they were going to be doing, but a pair of Converse never did her wrong, and there were some pictures of the person she was really dressing as in them, even if Matti, of course, didn't own any pink ones.

The cloak was the final piece, the one that tied it all together, that really made her feel like a Hogwarts student, and one in particular. It wasn't technically accurate, she knew, since Sierra mostly hadn't attended Hogwarts proper, but it was as close as she could get, and Sierra had attended Hogwarts for part of her education, anyway. As soon as she put it on, she was glad she'd went with the fancier version of the costume, because it was very nice and comfy, black on the outside and yellow on the inside, the Hufflepuff crest embroidered on one side of the chest.

She hoped Sierra would forgive her for dressing as her for Halloween, although, of course, if she were to meet Sierra again, there were other things that she owed her far more of an apology for. She suspected the witch would actually be glad to see the costume, and to find that it didn't include diapers. It did, however, have a hair bow, and Matti had bought a pink one of those to clip into her hair. Nobody would know what that meant, but, even without spraying some temporary hair dye into her hair to make herself blonde, or buying a wig, that one touch really did complete the look in Matti's eyes.

Was Valerie going to approve? She'd said yes, seeing it in the package, so hopefully so. It was far more modest than most of the costumes Matti would expect most college girls to be wearing, or that she'd seen them wear in the cafeteria past years, or stumbling around campus in after parties. She was very happy with it herself, though, for what it was worth.

Which was why she was disappointed when she got to Dr. Osswald's classroom. Valerie was dressed as a witch, which Matti might have mocked as being too easy, too stereotypical, if she didn't look so good in the tiny black dress, with a long, long slit up one leg, and the heels that made her tower even more than usual over Matti.

That wasn't what bothered Matti, however, even if she did feel like a little kid playing dress-up next to the other girl. What bothered her was what was laid out on Dr. Osswald's desk.

"I-I have a costume!" she whined, stomping her foot.

"I know you do," Valerie cooed at her, pinching her cheek. "And you look so cute in it! But, sweetie, I know what that costume is, and it isn't very accurate, is it?"

Matti blushed, squirmed. "Wh-What do you mean?" she asked.

"Oh, Mathilda," Valerie snickered. "Do you really think I don't poke around on your laptop after I have you unlock it for me to show me your grades during our lessons? I found your bookmarks, and I read through some of those stories you have in there, and looked at some of those pictures."

"I-I don't know what you mean," Matti fibbed, fidgeting in place.

"You don't, huh?" Valerie reached over, giving the hair bow a tap. "I think you'll make a very cute Sierra, but this isn't what she looks like, is it?" Valerie slid her fingers down Matti's body, ending at the hem of her skirt, lifting it up before Matti could try to stop her. "And she definitely wouldn't be wearing big girl panties. So I got you a much more accurate version of your costume."

Valerie stripped Matti completely naked, taking away every bit of the costume she'd been so happy with, other than the bow, before making her lie down on the changing mat, sliding a thick, crinkly diaper under her bottom, and dumping what seemed like half a bottle of baby powder onto her. "You have a long night ahead of you," she teased. "I don't want you getting a rash!"

More likely, Matti thought grumpily, she wanted to make certain the scent followed her around the whole night, which she had no doubt the girl had accomplished. She just hoped the smell managed to waft out of the classroom before Dr. Osswald got there on Monday, or she might wonder what they'd been up to.

Matti had really hoped that the second diaper on the desk was for later, even if she didn't want to think about when that change might happen, but, to her dismay, once the first one was secured taped up, it went underneath her as well, Valerie carefully cutting slits into the first. "I don't need double diapers!" Matti whined. "This is gonna be so thick!" She hadn't been in double diapers since this had all started, since she'd seen the real Sierra, briefly, since Serena had zapped her into them.

"I'm sure you don't," Valerie told her, "but Sierra does, and you want your costume to be accurate, don't you?"

Matti blushed, wiggling on her back, squeezing her thighs together once the second layer was pulled up between them, heart pounding as she felt how bulky they truly were. She was going to be waddling so much! Nobody was going to have to get close enough to smell the baby powder on her to know what she was wearing!

Especially given the rest of her costume. It was, technically, still a Hogwarts student costume, but it looked like one meant for a toddler, the whole thing simplified down to a tiny gray dress, the collar of a dress shirt and the tie printed onto it, rather than being separate pieces, and a black diaper cover, the Hufflepuff crest on the front, the seat of it covered in black and yellow ruffles. It, in fact, looked very much like something she'd seen from a picture of Sierra, but one where she'd been regressed to a toddler.

Next to Valerie, especially, in her sexy, slinky witch dress, that was exactly what Matti felt had happened to her. She had certainly looked more childish than the other girl in the version she'd bought, but this one took it to a whole new level, particularly after Valerie had finished it off with a pair of Mary Janes and a cheaper version of the cloak, one that fit her, and did help hide her padded bottom, yet didn't come close to allowing her to pull it closed around herself, to give her the option of hiding the front of her diaper as well.

She gasped as she stood there, at the front of the classroom, in shock, staring down at herself, seeing how short the dress truly was, even when she tugged at it as hard as she could. Even then, it barely reached halfway down the diaper cover, leaving most of it completely on display, the bulk completely obvious.

"E-Everyone's gonna see my diaper!" she squealed, blushing at how warm and tingly that made her feel between her legs, at how wet she could already feel herself getting. It wasn't like she was choosing to go out like this, to show off her padding. She didn't have a choice! And that, in a way, made it even hotter, even if she was horrified, thinking about who might see her.

"Yes," Valerie confirmed, giving the double diaper a pat, "they are." Valerie did pack up Matti's other costume, however, including her underwear, which gave her a sliver of hope, no matter how nerve-wracking it was to be led out of the classroom building like this, toddling along beside Valerie, crinkling and feeling like there was a cloud of baby powder following her, poofing out of her diapers with every step.

Thankfully, they weren't on campus for long, Valerie leading her away from there, down the street, where Matti was even more self-conscious to see kids out trick or treating. "I-It's not Halloween," she pointed out.

"No, but since that's during the week this year, they're doing trick or treating today," Valerie told her.

Matti's heart fluttered. "A-Are you taking me trick or treating?" she asked quietly. She'd had no idea what this was going to be, though she never would have guessed that. The thought of spending all night toddling around, going up to strangers' doors and ringing the bell, asking for candy, was so incredibly embarrassing, yet, simultaneously, so fun. She hadn't done that in years! She'd much rather have done it in her other costume, and perhaps endured a few jabs about her being too old to trick or treat, or at least she hoped people would be able to tell that, however. She doubted she'd get any of those comments now, not when she was so obviously, and so heavily, diapered.

"What?" Valerie scoffed. "No! I have a party to go to, I'm not wasting my Halloween weekend taking you trick or treating."

Matti squirmed. "W-We're going to a party?" she squeaked. She wasn't really much for parties in the first place, but definitely not when she was dressed like this! Being around a bunch of other people her age, dressed like Valerie no doubt, so pretty and mature looking, would only make her look more pathetic, more infantile. And what if her sister was there?!

"I didn't say that, either," Valerie said.

"B-But..." Matti furrowed her brow. "What are we doing, then?"

"You really don't listen, do you?" Valerie chastised her. "I'm going to a party. As to what you're going to do... Well, we're about to find that out."

Valerie led her through the gates of a small, private school, Matti immediately on guard until she realized they had a carnival set up. There were face painting booths, and snacks, and a few different games. Luckily, the students that were there were too preoccupied with all of those to pay much attention to her, though she found herself walking a little closer to Valerie anyway, trying to hide.

"Wh-What are we doing here?!" Matti hissed.

"I told you, we're going to figure out how you're going to spend the rest of your night. I want you to pick one of these games."

Matti looked around uncertainly, seeing a ring toss game where the targets were painted to look like witch's hats, pin the tail on the black cat, some doughnuts hanging from strings so people could see how quickly they could eat them without their hands, a jack o' lantern decorating contest, and a dart throwing game where the targets were balloons arranged in the shape of a pumpkin.

"What about that one?" Matti suggested, pointing to the latter.

"Sure," Valerie shrugged. "Whatever you want!"

There was a pretty young lady, just a few years older than Matti, running the booth who smiled at Matti, making her immediately duck her head, hands tugging uselessly on the hem of her dress. "Hi, cutie!" she exclaimed. "You don't go here yet, do you?"

"No, not yet," Valerie giggled, answering for the bashful Matti, giving the seat of her diaper a pat.

"Well, I hope you do!" the woman said. "My name is Miss Briana, and I'm a teacher here!"

"Are you going to say hi, Mathilda?" Valerie asked, bumping her with her hip.

Matti barely let herself glance up, mumbling, "H-Hi," quickly, trying not to look too closely at the woman, or to let her do the same.

Miss Briana chuckled. "This game might be a little advanced for her," she told Valerie. "We do use actual darts."

"Oh, I'm sure she'll be fine," Valerie said. "How many throws does she get?"

"She's really only supposed to get one," Miss Briana told her. "I mean, it's pretty hard to miss all these balloons. But, for the cutest little Hogwarts student I've ever seen? I'll let her have two."

"Isn't that nice?" Valerie asked Matti. "Say thank you."

"Th-Thank you," Matti blushed, watching as Valerie handed over the money and picked up the darts.

Luckily, Miss Briana was called away, another teacher rushing up to her, whispering something in her ear. "Sorry," she said. "You can go ahead and play if you want, and then stick around and I'll give you your prize when I get back."

"Okay!" Valerie smiled pleasantly, waiting until she was gone to address Matti. "All right, so, here's the deal. One game, no do-overs. If you can pop a balloon with either of these darts, I'm going to let you change back into your other costume, and then I will let you come to the party with me."

The 'let' in that sentence sounded suspiciously like a 'make' to Matti, and she couldn't help noticing Valerie didn't say that she'd let her go back to her regular underwear. While she was grateful that the girl didn't say the word 'diaper' out loud here, she doubted that she'd done that to keep from embarrassing Matti, but probably more because she was going to be keeping those on and hoped Matti didn't realize it. Her other costume would hide them better, probably, but would it be enough?

"And if I don't?" she asked nervously.

Valerie grinned. "If you don't, you're going to spend the night trick or treating. I got you a nice little treat bag, and you're going to keep going until you've got it all the way full!"

"I-In this costume?" Matti squirmed.

"That's right," Valerie nodded. "You're going to march right up to all those doors and beg them for candy while your diaper is showing so perfectly and preciously from under your skirt." She knelt down, brushing the dress off lovingly. "Won't that be fun?"

Matti gulped, taking the first dart from Valerie. She carefully took aim, let the first dart fly, and it planted itself right between two balloons, sailing between them perfectly. "Oh, so close!" Valerie exclaimed. "You're going to have to do better than that, though, if you don't want to spend all evening showing off what a cute little baby witch you are!"

"Valerie!" Matti whined, stomping one of her Mary Janes. "That's no fair!"

"Aww, I know," Valerie teased. "Everyone is going to want to pinch your little cheeks, and pat your little diapers. You'd better make sure you don't tinkle in them too much, or they're going to be able to tell." Valerie gave them a pat herself to demonstrate. "And you're really going to have to hope none of them think you're too cute and decide to keep you for yourself. You're not going to be able to run away very fast in these things, are you?"

"Nobody's going to kidnap me," Matti rolled her eyes, before starting to squirm again. "A-Are they?"

"I don't know," Valerie shrugged innocently. "It's Halloween weekend. Who knows what could happen?"

Matti couldn't tell if Valerie was making fun of her, or if she had something else up her sleeve, and the cheerleader signaled the end of the conversation without clarifying by handing over the second dart. "Good luck," she smirked, stepping back, letting Matti stare at the target, concentrating hard.

It wasn't that difficult, really. The balloons were mostly all bunched up, almost impossible to miss as long as she threw the dart hard enough. "Just one balloon," Valerie taunted. "Let's see it, Mathilda."

Matti nibbled her bottom lip, confirming her aim one last time, then threw, hands shaking. This time, the dart was so close she was sure she could hear it squeaking against one of the balloons, but, again, it went in between, none of them popped.

"Uh-oh!" Valerie giggled in delight. "Looks like somebody is going trick or treating!"

Matti squirmed, cheeks turning bright red. "B-But..." she said quietly.

"No buts, and no do-overs," Valerie told her, kneeling down in front of her. "I guess that teacher was right, and you were just too little for this game, sweetie. But you lost, and that's that."

Matti stomped her foot and pouted, but, in truth, she was doing her best not to smile, not to give away that, actually, she'd won, that she'd done exactly what she'd intended to do. She hadn't been so sure about the second throw, worried that her nerves would affect her aim, that she'd be off just enough to hit one of the balloons, but she hadn't wanted to make it obvious what she was trying to do, and if she'd missed entirely, she was afraid Valerie would suspect something was up.

Valerie had no way to know that Matti was, in fact, pretty good at darts. It almost felt unfair, not letting her in on that, but so was Valerie making her come here, dressed like this, making her make this decision. She had no doubt that, if she had gone to the party, Valerie would have some other humiliation in mind for her there. Trick or treating would be embarrassing, but it was probably better than whatever that would be, right? And, the more she thought about it, the more fun it sounded. She'd never choose to do it, but if she didn't have a choice in the matter, well, what could she do? She'd have to go along with it!

And now, Valerie had made it clear that was what was happening, and it was even more thrilling than she'd expected, bringing back the tingling, and the wetness, between her legs as it all sank in. She was going to be spending the rest of her night in this tiny dress, in this frilly diaper cover, instead of going to a party, like most people her age, she was sure, would choose to do for Halloween instead, and there was nothing she could do about it!

"Poor baby," Valerie teased, leading her away from the carnival, back out to the street, taking a large treat bag out of her bag and handing it over. "I expect you to get this all the way full, understand? No slacking!"

"B-But that's going to take all night!" Matti pretended to be upset.

"I'll guess you'll just have to bat your little eyes and look extra cute and hope they'll let you have an extra piece or two at every house," Valerie shrugged. "Or try taking more than that, and hope that nobody spanks your naughty bottom for being so greedy."

Matti blushed, fidgeting. Spanking was something else that hadn't happened since that first day, when all this had begun, although it had happened twice then. She could still feel a phantom throbbing in her backside at the thought of it.

"Or, I guess," Valerie grinned, "if you need a little more motivation to move quickly, I could come up with something."

It was silly, her pretending that she was coming up with it on the spot when she'd obviously planned it all along. Why else would she have had an egg vibrator tucked away into the treat bag to pull out and slide between the layers of Matti's padding, positioning it just right? Matti gasped, face burning, as Valerie carefully pulled a wire up from it, tucking something outside of the diapers, right under the diaper cover.

"This cost me a pretty penny, so you'd better be grateful," Valerie said. "I was confident you were going to fail, though." Matti had to bite her tongue, wanting to brag that she could have won if she'd wanted. "Once I activate this, it will go off when it hears the right phrase, but you have to say it nice and clear and loud. Can you guess what the trigger is?"

Matti watched as Valerie took out her phone, scrolling through an app and pressing a button in it. "T-Trick or treat?" Matti tried, bracing herself, but nothing happened.

"You have to be louder than that," Valerie rolled her eyes. "Don't worry, I'm sure you'll get it. Anyway, you can trigger it up to three times in a row before it goes into a cooldown mode, and if my calculations are right, that ought to be just enough for you to get a nice little extra treat, if you can time it perfectly. If not, you're just going to have to wait until you can try again, all sad and frustrated in your diapies."

"W-Wait," Matti blushed bright red. "Y-You want me to...?"

"Make stickies in your diaper?" Valerie mocked. "Well, I want you to try, anyway."

Matti could already feel herself growing wet, flashing back to her time in that daycare, being bounced on Ms. Emily's knee. This was different, though, being out in public. It seemed wrong, but, at the same time, she couldn't help how excited she was at the prospect of getting to experience that again.

"Have fun!" Valerie told her, sending her off with one final pat to the bottom, heading in the opposite direction. Matti stood there on the sidewalk, stunned, for a few moments, and, by the time she remembered that Valerie had her key to the dorm along with all her other possessions, she was too late, spinning, skirt flying upwards and exposing even more of her bulky diapers, straining beneath the diaper cover, than usual, the cheerleader nowhere to be found.

She also, she noted, didn't have her money or credit cards, so she couldn't cheat by going to a store and buying a bag or two of candy. She sighed, wondering how long she was going to wind up having to wait for Valerie to return to Dr. Osswald's classroom, where she assumed they'd meet up, or perhaps even the girl's dorm room.

That was a problem for later. Now she had a task to do. Nervously, she looked up and down the street, unsure which direction to start, finally deciding to go away from campus. She waddled down the sidewalk, blushing, yet almost giddy as she made her way to the first house. The porch light was on, but there was no candy, so she anxiously reached up and rang the doorbell, squirming in anticipation as she waited for it to be answered.

"Trick or treat?" she said hopefully as the door opened, pouting when nothing happened in her diaper.

"Aww," the woman on the other side cooed. "What a cutie! Here you go!" Matti took a piece of candy from the bowl, then hesitated, wanting to try for a second, but worried about what would happen if she did, Valerie's taunting ringing in her ears.

"Wait, do you not have any yet?" the woman asked, seeing Matti's empty bag. "Here, take some more! Go on!"

Maybe this was going to be easier than she'd thought. "Thank you, ma'am," she said as she took another piece, and then, at the woman's urging, another, practically skipping back down the sidewalk. Or, she might have, if not for her double diapers slowing her down. There was no way the woman hadn't noticed them, but at least she hadn't said anything about them, hadn't made fun of her. Maybe that was a good sign that nobody else would, either.

If she could manage to trigger the vibrator, she wanted to be sure she wasn't around any real trick or treaters, so she hung back, letting them clear out before toddling up to the next door, waiting until she saw the doorknob begin to turn before speaking, being louder this time, trying not to mumble, despite how embarrassing it was.

"Trick or treat!" she declared, and, instantly, the vibrator came to life in her diapers. She gasped, toes turning in towards each other, teeth clamping down on her bottom lip as the door opened and, just her luck, an attractive older man was standing there, looking down at her.

"Here," he told her, holding out a bowl. Matti couldn't move for a moment, however, as she struggled to swallow her moans, to keep him from knowing what was going on. Which, of course, just made him look more closely at her. "Do you... need to come in and use my bathroom?" he asked. She blushed and shook her head quickly, prompting him to raise an eyebrow and switch the question to, "Do you need to come in and change?"

"N-No!" she squeaked. "Th-This is a costume!"

"Mmhmm," he replied skeptically. "Whatever you say. Do you want some candy or not?"

Meekly, she took a piece, and forced her legs to start moving, to carry her away from there, heart pounding. The vibrator turned itself off partway across his yard, which was, in a way, a relief, though it hadn't been nearly long enough to do much more than tease her.

The next house had its candy waiting out on the porch for her, but she couldn't resist saying, "Trick or treat!" out loud anyway, wiggling there as she pretended to be searching for the perfect piece of candy from the bowl, her breath quickening as the vibrations brought her closer and closer to the edge, only to stop short.

She thought she'd found a way around Valerie's plan, or at least to make it less humiliating, but as she got back to the sidewalk, she could see that there were people out on the porches of the next few houses. She could have passed them up, waited for the next one that looked more private, probably should have, but it looked so far, and she was too desperate.

She hurried to the first empty yard, getting a few steps before seeing who was waiting for her at the other end. She was absolutely gorgeous, her curvy body nearly spilling out of the slinky red Jessica Rabbit costume she was wearing. She would have made Matti feel like a baby in comparison to even if she wasn't in diapers, and on the verge of having an orgasm in them.

She planned to grab her candy and rush out of wherever she was, but she couldn't run the risk of being too slow in front of this woman, of letting her see what was about to happen. She turned around, blushing, and started to leave.

"Where are you going, cutie?" the woman called out. "Come on, I have plenty of candy for you! Don't be shy!"

"I-I..." Matti groaned, her brain too muddled to come up with any excuse, any reason not to trudge over reluctantly.

"Aww, how adorable," the woman purred as Matti stepped into the range of her porch lights. "Are you a little witch in training?" Matti blushed and nodded. "Looks like you need training in more than just your magic," the woman quipped. "Now, what do you say?"

"Tr-Trick or treat?" Matti whispered.

"What was that?" the woman asked playfully. "You'll have to do better than that!"

Matti froze, terrified to go any louder and risk setting off the vibrator. She stood there awkwardly, too scared to speak, too scared to move on to the next house, too scared to do anything.

"Are you training in that, too?" the woman teased. "Let me give you a lesson. You're supposed to say 'Trick or treat!' nice and loud, just like that!"

Matti squealed as the vibrator came back to life, obviously having heard the 'lesson.' She wanted to get her candy and run, as she'd planned to do, but the sensation was too intense for her to do anything other than stand there, both mortified at who her audience for this had turned out to be, and excited at the prospect of experiencing this again after her first time in the daycare.

"Now you're supposed to take the candy," the woman chuckled. "Here, I'll help you with that, too." She picked a piece of candy out of her plastic cauldron, bending forward, giving Matti a perfect view down the front of her dress as she slipped it into her bag. "Just like that, little witch! Do you need another demonstration?"

"N-No!" Matti shook her head.

"Then toddle on to the next house and give it a try!" the woman urged, taking Matti by the shoulders and turning her around, giving her a pat to the bottom, letting out a giggle as she heard the crinkle, then patting them again. "Are those real diapers, little witch?"

Matti shook her head, mortified to feel the back of her cloak and hem of her dress being lifted, the back of the diaper cover tugged out. "Uh-oh!" she cooed. "Looks like somebody is a little liar!" Matti was turned back around, the woman's fingers moving to her chin, lifting it up, forcing her to look her in the eye. "This isn't a costume at all, is it?"

Matti's whole body was on fire, and she knew she was moments away now. She shivered, staring up at the woman helplessly. "I-I'm not a witch," she managed to blurt out.

"But you do need your diapers, don't you?"

Right then, with Matti right on the edge, extra humiliated at the thought that this woman believed she needed her diapers, the vibrator stopped short. She let out a whimper, rubbing her legs together, so close and yet so far.

"You know what?" the woman smiled. "I think that's precious. And you get an extra piece of candy for that!" She released Matti, getting another piece of candy from her cauldron, then sent her on her way.

Matti waddled away as quickly as she could, her legs working again at last, passing up the next couple houses until she found a dark, quiet spot. Desperately, she put a hand between her legs, starting to rub, but, through the double diaper, it wasn't enough, not even now, as close as she was. If she'd put her hand down, between the layers, maybe she could have done it, but she was already self-conscious enough about doing this out on the street. Finally, she gave up, accepting that she just hadn't been fast enough between triggerings. And now, she was going to have to wait for it to reset.

As it grew darker, and later, she got fewer comments, people either not able to see her as well, or too tired from handing out candy all night to care. She did get some stares, and a few snickers, though that was mostly the worst of it. She wasn't sure if that was a good thing or not, though, if people just assumed she was small enough that needing diapers was natural. She had no idea how long it would be before the vibrator would start back up, but she was getting fewer and fewer opportunities as it was starting to get late enough that more people were leaving the rest of their candy out on their porch, relying on 'One piece only' signs to deter greediness.

Matti abided by them at first, scared off by Valerie's warning, though she got more daring as the night went on and the streets began to get emptier. Not only were there fewer people that she was taking candy from, but she was also starting to get worried that she would run out of houses before the bag was full.

The sidewalks weren't totally empty, however. As she was peering into her bag, gauging how much she had, she bumped straight into someone else. "S-Sorry!" she exclaimed, looking up, heart pounding at the sight of a tall guy dressed as a skeleton, plastic mask over his face as he turned down towards her. "S-Sorry," she repeated, squirming. The costume was tight, leaving little room for doubt that he was quite attractive, though the mask hiding his face made him seem creepy regardless, especially as it stared down blankly at her.

She hurried away, a chill running down her spine, thankful that she had to ring the doorbell at the next house, even when the owner came out in a bathrobe, green makeup half removed, looking a bit grumpy, as if they'd simply forgotten to turn off the porch light. Matti didn't dare ask for any extra candy, even though there was quite a bit left in their bowl. She did say, "Trick or treat," however, and, at last, the vibrator triggered. It was a strange combination, feeling that pleasure a moment after she'd had her first genuine scare of the night, but mostly she was annoyed, having seen that there weren't many other houses where she'd be able to say the words.

"It's getting a little late, don't you think?" the woman asked. "Maybe you should head home."

"Y-Yeah, maybe," Matti agreed. Except, she couldn't do that. Her bag wasn't full yet, and her chances to change that were growing more and more sparse as she passed houses with their porch lights off and no candy left outside, nothing to indicate they were still open for business.

The lack of other people began to grow more creepy than comforting. She could have, she knew, said the trigger words at any of those houses, but in order to say them loud enough for the vibrator to reliably hear them, she'd risk bringing the house's occupant out there. While it might have been nice to see someone else, they might also be annoyed at her for bothering them when they were clearly done with actively participating in trick or treating, so she kept quiet, and kept toddling her way through the dark, increasingly chilly, night.

It only seemed to get colder when she once again bumped into one of the few people that were around, looking up and seeing, once again, the skeleton mask. Her stomach lurched, suspecting that it hadn't been an accident this time, and very possibly not the first, either.

The other thing Valerie had teased her about, about getting kidnapped, suddenly came to mind as she backed away. What was she going to do, if that was what this person had in mind?! She had nothing to defend herself with! She gulped, moving further and further away, grateful when he didn't follow, but starting to feel genuinely scared.

Would Valerie understand if she went back with her bag only mostly full, if she told her about this? Or would she think Matti was making it up to get out of finishing the job? She couldn't even call to ask, to explain, or to ask someone for help, because Valerie had her phone, too. She was all alone, dressed up like a toddler, and feeling about as helpless as one.

"Trick or treat," the skeleton called out mockingly, Matti's eyes widening. It wasn't an unusual thing for someone to say tonight, of course, and it was surely a coincidence that it set off her vibrator, but it felt even stranger now, staring down this creepy person as it rumbled away in her diaper, sending waves of bliss through her body for long enough to leave her desperate for just a little more, for that third round that, surely, this time, would do it.

When she did see a candy bowl still out, she began to blatantly disregard the signs on them, taking as much candy as she dared, rushing down the street towards the next porch light. She wasn't sure what made her do it, but after a little while, she turned back, looked behind herself, and saw the skeleton following behind her.

"L-Leave me alone!" she shouted, wishing her voice hadn't come out so squeaky, so scared sounding. "I-I live right up here!"

He wasn't so close that he could grab her immediately, but he also wasn't far enough away for her liking, knowing that the diapers she was wearing were going to slow her down considerably if she needed to run away. She tried the doorbell at the next house she went to, hoping whoever was inside would let her come in for a minute until he went away, but they ignored her, probably assuming she was some prankster.

She grabbed a couple handfuls of candy instead and moved on, toddling as fast as she could go, whimpering at the sight ahead of her, the street dark, no lights on inviting lingering trick or treaters. She couldn't turn back now, couldn't pass the skeleton, so she kept going, praying there would be at least one more, somewhere, if she kept going.

Finally, she spotted the light in the distance, Mary Janes pitter-pattering across the sidewalk as she hurried towards it, relieved. It, of course, had a sign out asking her to take one piece of candy, but there was enough left to finish filling her bag, so she began scooping it out desperately, taking all that she could.

A hand clamped around her wrist, and she squealed, blushing as she felt a squirt of pee escape into her diapers, certain that she'd been caught at last, that she was about to get a spanking. Instead, it was something worse, which made her wet herself again, the stream going longer this time as she stared up at the skeleton mask.

"Can't you read?" the man behind it asked. "Or is that too much to ask for someone who's still in diapers?"

Matti opened her mouth to scream for help, only to have something shoved into it, an oversized pacifier silencing her as she squealed frantically behind it, the skeleton pulling the strap on it tight, fastening it, locking it into her mouth. "Trick or treat," he said again.

Her knees nearly buckled, and she struggled to fight through the sensations flooding through her, knowing that, as incredible as it felt, and as much better as she knew it would feel if she gave in, she had to get away. She made a dash for the door, praying that the people who lived here were home, that they would answer, but she didn't get far before he grabbed her wrist again, stopping her short, yanking her back towards her and giving the seat of her diaper a hard swat. Even through her double diaper, it stung, showing her exactly how strong he was, exactly how unlikely overpowering him would be, which, embarrassingly, given her current situation, just turned her on more.

"No," he scolded. "Bad girl! Don't make me spank you!"

Fearful tears filled Matti's eyes as she was pulled away, out into the dark streets, her diaper growing warmer and wetter still as she realized how screwed she was. He was much bigger than her and stronger than her, she couldn't call out for help, didn't have anything to use as a weapon against him other than a bag full of candy, which was heavy, sure, but not enough to do any damage.

Once again, the vibrator stopped just short, though that was probably a good thing. She didn't need to do that here and now, no matter how good it would feel. She needed to clear her mind, think up a way to get free, something that she'd told herself she hadn't been able to do yet because of the vibrator's teasing. Even once it was off, however, she had no idea what she could do.

She mumbled into the pacifier gag, trying to reason with him, to beg him to let her go, but she couldn't get any words out around it. All she could do was shuffle along beside him, imagining the worst as she was dragged through the neighborhood, blushing deeply in shame at how horny those thoughts were making her right now, after getting edged twice tonight, having to remind herself that this was real, not some fantasy.

She heard the music, and all the laughing and talking, from a ways away. That might be her best chance, she thought. If she could wriggle free from his grip near where it was coming from and go towards it, perhaps someone there would help her, or he would, at least, be too scared of that happening to follow. Fortunately, he seemed to be headed right towards it, so she stopped her usual squirming for a minute, saving up her strength as best she could until the perfect moment.

To her surprise, when she let it loose, she managed to pull free of him, stumbling forward, waddling as fast as her legs would take her around the house, to the backyard where the party was going on, nearly running straight into...

Valerie. Matti blinked in confusion, staring up at her. That was way too much of a coincidence, she thought, even before she saw the look on Valerie's face, and before the guy in the skeleton costume sauntered in, Valerie slinking over to him, pushing the mask up and off his face, planting a big kiss on his lips as Matti recognized that it was her boyfriend.

"Great job, Lance," she told him, as Matti began to calm down a little, her fear turning to anger as she realized what had happened.

"Are you sure she was okay with that?" Lance frowned, looking down at Matti. "She looks terrified."

"Oh, she's fine," Valerie rolled her eyes. "She told me that was one of her biggest fantasies. You made her year, sweetie."

Matti wanted to tell her off, and might have, regardless of the inevitable consequences of that during their next 'lesson,' but the pacifier gag kept her from saying anything, or doing anything other than staring at the two, still slightly in shock.

"Now, let's see how you did," Valerie said, taking the bag of candy from Matti and opening it up. "Hmm," she pursed her lips. "Well, it is full, anyway. Here, why don't you take this back and see if anyone here wants some?"

Matti's eyes widened. After all of that work, and everything Valerie had put her through, she expected her to give her candy away?! Matti shook her head defiantly.

"Mathilda, you are going to do as you're told, or Lance is going to pull your diapers down and take you over his knee right in front of everyone," Valerie informed her harshly. Matti squirmed, remembering what his spank had felt like even through the diapers. "That's what I thought," Valerie smirked, bending down, slipping the vibrator out of Matti's diaper and into her own bag, Matti letting out a squeak of frustration, even if she hadn't really wanted it to go off now, in front of all these people. "Everyone?" Valerie announced, grabbing Matti by the wrist. "Look who came to join us!"

Matti was pulled forward, blushing as she felt everyone's eyes turning towards her, heart pounding as she began to recognize many of the girls there from cheerleading practice. She had to assume that, like Lance, most of the guys were from the football team, and they were certainly big enough that she could believe that.

She squirmed, not wanting to look at any of them, to see how they smirked at her, or snickered, or smiled like they might if they'd seen a particularly adorable kitten. She had to, though, had to confirm that, indeed, she at least didn't see her sister anywhere. She had to assume she'd been there at some point in the night, if the other cheerleaders were, so maybe it was a good thing she hadn't popped those balloons so she could come here with Valerie after all.

"Little Mathilda here brought us all some nice snacks! Isn't that sweet of her? She's such a cute little helper, isn't she?" There was a bit of applause, which only made her more self-conscious. "Feel free to dig around until you find something you like. You can get rid of whatever you don't right here. Wait, let's get rid of this."

She pulled the cloak off Matti's shoulders, then spun her around, lifting the back of her skirt and tugging out the waistband of her diaper cover and diapers. Matti squealed into her paci at the indignity, at the open invitation for all of these people to do the same to her, as Valerie demonstrated. "Oh, gross, Mathilda," she shook her head, pulling out a handful of candy. "Honestly, this serves you right! You should have gone to the houses with the good candy!"

Valerie unwrapped them all, dropping them all into the back of Matti's double diaper, Matti blushing as she felt it settle there, sticky and already starting to melt against the warmth of her bottom. "Go on," Valerie urged with a grin. "Be a good girl and make sure you see everyone here."

Matti was still mad at Valerie, but after that announcement, there wasn't much she could do, a few of the cheerleaders eager to start out, cooing over Matti, giggling to one another as they looked through her bag of candy. "Oh, my God, Matti, this is such a cute costume!" one of them told her. "A little baby witch! That's so creative!"

"Please," the other rolled her eyes. "You know she wears them, like, all the time, right?" Matti blushed and groaned into her paci-gag, shaking her head. "Don't tell me you haven't seen them under her uniform at practice."

"Oh, right," the other giggled some more. "I did wonder about that. You don't actually need these, do you, Matti?" Matti squeaked as the cheerleader reached down, gave her diaper a squeeze. "Oh, my God!" she exclaimed again, her voice going even higher. "What have you been up to in these diapers, young lady?"

"N-Nothing!" Matti protested, trying to pull away from the bigger girl.

"Does nothing include peeing your pants like a two year old?" the cheerleader teased. "These are so, so squishy!"

Matti whimpered, shook her head as the other cheerleader followed suit. "You're soaked, Matti!" she cooed. "Does Kelsey know about this?" Matti's eyes widened, her head shaking again, more frantically. "Oh, she would love to hear all about this. I guess you're going to do everything we tell you in practice from now on if you don't want us to tell her, huh?"

Matti pouted. Practice was hard enough, having to deal with Valerie! She'd been worried the others would know that Valerie made her wear diapers during them, but after tonight, she suspected any suspicions they might have had were going to be confirmed, and she was going to be at the mercy to keep her sister from finding out. At least the football players would hopefully assume it was part of her costume, and nothing more, as long as they didn't overhear the teasing from the cheerleaders, but that didn't do much to lessen the embarrassment as she toddled up to them and held out her ever-dwindling bag of candy.

A few pieces did get eaten, at least. Most of them were cheap, however, the kind of thing that, even as a kid, you'd keep putting off eating, pushing aside until you had nothing else left. That was, she supposed, why the owners of the houses they'd been at had been fine with leaving them out, not really caring if kids followed the signs and took only one piece. It had been good enough to fill out her bag, but, unfortunately, now it was, instead, filling out her diaper in a huge, gooey mass as the partygoers tossed aside all the duds in search of one good treat, quickly making it look like she'd done much more than wet her pants, which only made it more embarrassing to waddle through the party, offering up her candy bag to everyone she saw until, finally, it was completely empty, with not a single piece left for her.

"Good girl," Valerie told her when she toddled up to her, waiting awkwardly for her to finish making out with Lance so she could show off that she was finished. "Did you have fun tonight?"

At last, Valerie unclasped the pacifier gag, pulling it out, Matti blushing as a line of drool came out with it, dribbling down her chin. "No!" she whined. "That was really messed up, Valerie, you...!"

"Oh, please," Valerie scoffed. "You don't fool me. I know you enjoyed that." She picked Matti up, plopping her down, straddling one of Lance's legs, facing him, Matti turning bright red as her bottom sank into the mass of melting sugar in her pants, and as she heard herself let out a tiny moan, right in front of Lance, unable to help herself. "She told me she really wanted to tell you all about her costume," Valerie told Lance. "Why don't you give her a little horsey ride while she does?"

Lance, gamely, began to bounce Matti on his leg. If she was being honest, she felt the tingling between her legs, pretty much a constant since she'd even seen the vibrator, much less had it start going off, intensify ever since she'd been told she was giving away all of her candy, and only grow stronger until now. Now, after this whole night, she couldn't help it, couldn't keep from squirming, rubbing her diaper against Lance's leg, too desperate and frustrated to stop herself regardless of how humiliating she knew it would be to do this in front of him, with him staring right at her, and with Valerie watching.

"Go on," Valerie urged, and, for a moment, despite wanting to contain herself, to pretend Valerie had been wrong, Matti assumed she wanted her to rub harder and was more than happy to oblige. "Tell him who you are, Mathilda."

"Ummm..." Matti blushed, grinding against his leg. "W-Well, there's this witch, a-and her name is Sierra, and..."

"And she's a baby?" Lance asked.

"N-No, not exactly," Matti told him, breath quickening, brain turning foggy with hormones, making it harder for her to form coherent sentences. "Sh-She gets into a lot of trouble, a-and when she does, she hasta... A-A lot of time she ends up in diapers, or turned into a baby, or..."

"And that's who you wanted to dress as for Halloween?" Lance lifted an eyebrow, his incredulity only egging Matti on.

But Valerie plucked her off of her boyfriend's leg before she could finish up, setting her down on the ground. "I know, right?" she giggled. "So sad."

Matti whimpered, watching Valerie give Lance another kiss while she was sitting there in front of them, so close to getting off, yet stopped short once again, one final indignity for a night full of them.

Or so she'd assumed. "Here," Valerie said after a moment, reaching into her bag and pulling out a bottle full of juice. "I brought this for you. You sit here and drink your baba, sweetie. We'll walk you home and tuck you in when we're done here. We wouldn't want you to get kidnapped or anything, would we?"

She winked at Lance, then went back to making out with him, leaving Matti there, frustrated and frowny, to wait and watch, nursing her bottle, without even a single piece of Halloween candy left over to make her feel better.