Matti woke up wet, although, by now, that really shouldn't have been a surprise. Ever since Valerie had forced her to move in with her, and had been putting her to bed super early, after feeding her a bottle of milk that never quite tasted right, which Matti tried to chalk up to it being microwaved, it had been happening. It also wasn't a surprise because Matti had been awake when it happened. She had been falling asleep earlier and earlier, despite her nightly protests that she wasn't even close to being tired at her 'bedtime', but it was never early enough to avoid having to pee, something she definitely wasn't allowed out of bed after she was tucked in to do.

This morning, however, something was different. She couldn't remember what, exactly, she'd been dreaming about that had made her thrash around so much, but one of her legs was feeling a bit chilly, all of her covers having been pulled off of it, bunching up in a weird way. She groaned, not wanting to get up, cuddling up to the mass of blankets without thinking.

She let out a tiny gasp as her soggy diaper rubbed against the blankets between her legs. She blushed, glancing over towards Valerie's bed, but without her glasses on, it was hard to tell if the cheerleader was there, or if she was seeing the girls' own blankets. Peering over at her cell phone, however, plugged in at her bedside table, it was late enough that Valerie should already be on her way to her first class.

Which meant she had a little private time. It was odd that Valerie hadn't woken her up to change her, and pick an outfit out for her, and give her her key, but maybe she'd been running late, and hadn't had time. Or maybe she was already getting bored of this whole game. Matti knew that should be a good thing, not having the other girl as interested in completely running her life, but at the same time, it was a bit disappointing that it had happened so quickly. She may have had to ask permission to hang out with her friends, or wear what she wanted, or to do pretty much anything, but it really had made her feel like she was a helpless little girl, totally at the mercy of her slightly sadistic babysitter.

She squirmed, face flushing as her diaper brushed against the covers again. It wasn't her fault she was so turned on, she reasoned. After Valerie had added a vibrator to the chalkboard 'training sessions', it was hard for Matti not to think about how good she knew a wet, or even messy, diaper could feel. And, when she was spending so long in soggy diapers every night, of course she'd thought of doing something about it, but she was always scared Valerie would catch her, or, even if she wasn't in the room, that she'd walk in at just the wrong time.

Now, though? There was nothing to stop her, except her own dignity, and that was in short supply these days. She moaned softly as she thrust her hips harder at the blankets. She should be ashamed of herself, a grown woman, almost ready to graduate college, trying to get off in a wet diaper, but in its own way, that only made it hotter. She rolled over onto all fours over the blankets, lowering her crinkly bottom down onto them, unable to help herself as she started to hump away in earnest.

"And what do you think you're doing, young lady?"

Matti gasped, a fresh squirt of urine dribbling into her diaper as she froze, turning, wide-eyed, to find Valerie standing behind her, in her skimpy nightie, hands on her hips. Matti's head reeled with humiliation, realizing she was wrong, and that she'd been doing all this with the cheerleader in the room. "I-I was just..." she stammered, frantically searching for an excuse. "I-I thought you'd left for classes!" she pouted when her mind came up blank.

"My early class isn't today, dummy," Valerie smirked.

"I-It isn't?" Matti frowned. She'd be so sure! There was no way she would have done this if she hadn't been!

"No," Valerie shook her head. "Jeez... You really are becoming a brainless little diaper bimbo, aren't you?" Matti shook her head, blushing bright, but it was hard not to feel like that was the case. Already, her grades had been plummeting, thanks to Valerie 'helping' her with her homework, and Matti intentionally missing a few questions on her tests to try to keep herself from having to spend quite so much time at the chalkboards on the weekends, but those weren't her fault. This was an honest mistake, and one she should have been able to avoid. It was early in the morning, she rationalized. That was all. Valerie wasn't truly twisting her mind, not to that degree. Right?

"It's okay," Valerie chuckled. "I'm not mad at you. In fact, I'm proud! You're doing such a good job!" She reached out, pinching Matti's burning cheeks. "I would say this even calls for a reward."

Matti watched her step across the room, her heart speeding up when she saw the girl pull the vibrator Matti had gotten very acquainted with at her training sessions out of the closet. She felt herself start to wiggle in place again, just from seeing it, so there was no way she could deny it, no matter how much she might feel like she ought to, when Valerie asked, "Do you want a little time with this?"

It was more awkward than Matti would have expected. Valerie had used it on her plenty of times before, technically, but then it was always when it was strapped to Matti's thigh, and she was simply flipping it on and letting it run. Now, the girl was holding it, smiling smugly down on Matti as she pressed it to her soggy diaper. And Matti's mouth wasn't full, her face not facing the chalkboards, meaning it was far harder to hide the intense pleasure that it brought her, or to deny that she really, really loved this, despite her increasingly unconvincing attempts to do so when Valerie asked if she liked her diapers after each of their training sessions.

"Come on, baby," Valerie teased, pressing the vibrator tighter against Matti's wet padding, the smaller girl writhing and moaning helplessly. "Are you going to cum for me?"

"Y-Yes!" Matti panted, her body pushing back against the buzzing hungrily, trying to get closer and closer. Any moment now, she was going to, and it might be embarrassing, doing it like this, with Valerie watching, but she couldn't bring herself to mind.

And then, just before it happened, Valerie switched it off. "No," she giggled, "I don't think you will."

"V-Valerie!" Matti's eyes widened, her blood still pumping as she stared up at the cheerleader, her palms still shaking as she reached up to brush a strand of her sweaty hair out of her face. "Y-You're joking, right?"

"No, I'm not," Valerie said, unplugging the vibrator and starting to put it away, Matti watching desperately from her bed. "I think it would be better if you saved that for your lessons."

"B-But..." Matti whimpered. "Why did you start, then?!" And why had she let her get so close?!

Valerie shrugged. "Because I thought it would be funny. And I was right!" She laughed at the look on Matti's face. "Aww, it's okay, sweetie. Here, I got you a little present. Maybe that will make you feel better." She took something else out of her closet, a shopping bag, tossing it towards Matti's bed. "You are just so expensive," Valerie teased. "I already buy you so much stuff! So many diapers, and fun toys..."

"Y-You don't have to," Matti pouted. "You can stop anytime."

Was that really what she wanted, though? Matti had always loved getting gifts. There was something different about being given something, rather than buying it for yourself, especially if it was something that you definitely wanted, but would never have got on your own. And getting those things from Valerie, especially, always made her feel funny, and not necessarily in a bad way.

What was inside the bag was no exception. She could see right away that it was pink, which made her wrinkle her nose, and pulling it out didn't change her opinion of the color. She would never have chosen to wear it, or the things she pulled out of the bag, but there was still something about the fact that Valerie had bought it for her, that she either thought Matti would like it, which seemed unlikely since she had met Matti, or that she was trying to turn Matti into the sort of person that would like this.

"We still need to go clothes shopping," Valerie reminded her, "but these will do for now."

Were these the kinds of things Valerie wanted to stock her new wardrobe with? Matti blushed, staring down at the skimpy outfit. The skirt was pleated pink plaid, and quite short, no longer than the skirt on Matti's cheerleading uniform, although it didn't seem to come with bloomers to wear underneath. And the shirt was a crop top in a matching shade of pink, emblazoned with the Barbie logo.

The cheerleading uniform was really Matti's only point of reference. If she could avoid it, she never wore skirts, much less ones that tiny, and the shirt was closer to the top of her uniform than anything she'd have chosen to wear in public. And that was really the sticking point. She'd had to wear the uniform to practice a few times now, sometimes with a diaper underneath, but she'd never just gone to classes in it, or walked around campus, other than straight back to her room if Valerie refused to give her back her real clothes after practice.

What were people going to think if they saw her wearing this?! What were her friends, especially, going to think of this sudden shift in her fashion choices?! "I-I can't wear this," she shook her fuzzy head, still swimming after being brought so close to pleasure, then getting denied. "I'm going to be flashing my underwear all day in this thing!" She held up the skirt, seeing how small it really was, wondering if it actually might be shorter than the one from her uniform.

"No, you won't," Valerie assured her.

"Yes, I will!" Matti sulked. "I'm not used to this sort of thing, not like you!"

"No, you won't," Valerie repeated. "Because you're not wearing panties." Matti was certain she used that word specifically, since she knew how much Matti disliked it. Matti did her best not to call her underwear that, but with Valerie calling them that so often, she'd found herself slipping up now and then.

"I-I can't just go..." Matti's face burned at the idea of running around in that tiny bit of fabric and nothing underneath. She knew some people did that, but she definitely wasn't one of them, and definitely not in this outfit!

"After your little display this morning," Valerie continued, "you're going to wear a Pull-Up."

"What?!" Matti squawked. If Valerie didn't make her wear diapers, she often put her in Pull-Ups for cheerleading practice, but that was after Matti's classes, and once it was over, she could go back to her room and change back into her undies. And, really, Valerie had been sticking mostly to diapers lately anyway, so the Pull-Ups were going to waste. Today, however, classes hadn't even started yet! And in this skimpy little outfit, it was very possible that people would be able to catch a glimpse of them! And a lot of her professors were probably parents, or had at least babysat, and were familiar with what Pull-Ups looked like, and if they saw a hint of them... "Valerie, no!"

"Tell me no again, Mathilda," Valerie smirked, "and I'm going to clear out your entire panty drawer and replace them with Pull-Ups, and you will wear them every single day."

Matti squeaked, squirming in place, her blood starting to pump again. That was always a big moment in diaper stories, when that happened. She wasn't in one, of course, and she ought to be more upset about the thought of Valerie throwing away so many of her possessions, but in the moment, no doubt thanks to being edged just a few minutes before, it was hard not to simply be turned on by it.

"As it is, I expect you to keep your training panties dry all day, or you will be wearing them tomorrow, too. We both know you're a bedwetter..."

"No, I'm not!" Matti protested, only to be given a smug stare, before Valerie's gaze dropped to the soaked diaper around her waist that very moment. What they both knew was that she'd done that before she fell asleep, but Valerie loved to refer to it as bedwetting. And, honestly, Matti found that pretty hot as well.

"But I'm giving you a chance to prove that you don't need your diapers during the day, too." Matti gasped, imagining being sent to classes in this outfit with a full-blown diaper underneath. "I'd advise you not to waste it."

With that, she spread Matti's changing pad out on her bed, Matti scooting over onto it. Valerie worked quickly, wiping Matti off, teasing her only a little with the cool baby wipes before slipping the Pull-Ups over her crotch, letting them snap into place. She didn't stop there, either, stripping the girl out of the jersey she slept in and putting her into her new outfit, finishing it up by helping her into her Velcro sneakers.

Matti blushed as she stared at herself in the mirror, after finally putting her glasses on, telling herself she was just looking so she could get her dinosaur hair clip positioned correctly. Did she really need it today, though? Seeing her reflection, there was no doubt she was a girl. The question came from how old she was, whether she was some little girl with very permissive parents, or a teenager who had never quite mastered the simple concepts of tying her shoes or keeping her pants dry.

"I-I don't know if I..." Matti said, turning around to face Valerie, only to stop, seeing the girl in the midst of pouring some kind of powder into a bottle of milk. "What are you doing?!"

"Oh, don't worry about it," Valerie shrugged nonchalantly. "With all this messing around, I don't think you have time to get to the cafeteria for breakfast, so I'm making you something here."

"What are you putting in it?" Matti narrowed her eyes. Was this what made her nightly bottles taste so odd?

"It's like a protein shake, kind of," Valerie lied. Matti had her glasses on now, so she caught a glimpse, when Valerie put the canister of powder away, that it said it was fiber. "It's to make it more filling."

That was true, in a way. Matti knew about fiber, too, from the diaper stories. It wasn't necessarily that it was more filling, but it would make the contents of her bowels expand somewhat, and make her feel more full that way. And, possibly, it would make those contents harder to hold. Was Valerie trying to get her to mess her Pull-Ups?! That would really prove she didn't deserve to get her undies back tomorrow!

Then again, if that was what Valerie had been putting in her nightly bottles, it didn't seem to have much effect. "I-I'm not hungry," she tried anyway, just to be safe, but Valerie was already pulling on the strap-on harness. "Really?" she pouted. "Even now?"

"Practice makes perfect," Valerie cooed, slipping the bottle into place. "Come on, Matti, come get your breakfast!"

Matti shuffled over to her, feeling the Pull-Up rustling between her thighs, then knelt down, blushing as she stared up at Valerie, obediently doing what she did every night and taking the nipple of the bottle into her mouth, sucking away. It felt different now, however, and not just because it was morning and not evening.

The fiber definitely changed the texture and taste of the milk slightly, but it definitely wasn't the same as what her nightly bottles tasted like. Was Valerie giving her something else then, after all? Was Valerie drugging her?! She knew she ought to be genuinely worried about that, about what she was being given, and whether it was doing something more serious to her than making her get sleepy earlier than usual. She wasn't a protagonist of one of those diaper stories. She was a real person!

But right now, after getting so cruelly edged, sitting here in her skimpy outfit and Pull-Up, facing a full day dressed like that, it was hard not to be turned on by how much control she'd lost, how much power Valerie had over her. She nursed a little harder on the bottle hanging from the cheerleader's crotch, face warming as she started to squirm, training panties rubbing against Valerie's fuzzy carpet.

"I wouldn't do that if I were you," Valerie grinned. "I told you, Mathilda, I expect those Pull-Ups to be totally dry tonight."

Matti groaned into her bottle, forcing herself to sit still as much as she could, already wondering how she was going to make it through. One thing was for sure: this was going to be a very, very long day.

And she didn't even know the half of it yet.