Matti wiggled on the floor, still stunned as she sat there, Mattix seated beside her as she stared down at the coloring book that had been placed in front of them. She could hear the high school girls giggling on the sofa behind her, and there was a part of her that was certain they were laughing at her. How much had Kiara really told Skylar? Skylar couldn't actually believe she was a little girl, could she?! But wasn't that worse, in its own way, having her know that she'd contributed to regressing and diapering a college senior, turning her into the pathetic toddler who had been banished to the floor, away from the real furniture?

How long were they going to stay there, chatting and watching her? Any moment now, Dr. Osswald could appear, and find the young woman she'd hired to tutor her daughter, dressed up in a baby diaper, with a matching baby doll by her side, and a pacifier lodged firmly in her mouth. There was no way she could talk her way out of that one, no way that she could win her professor's trust back when the woman saw what her daughter had been able to do to her!

She needed to stand up and put her foot down, tell Kiara that she needed to get back to her homework and send her friend home. It may not look like it at the moment, and she may not feel like it, either, but she was the older one here, and she was in control! She tried to do it, too, shifting in her seat, getting her feet beneath her, only to hear the sound of her diaper crinkling, followed quickly by the girls giggling again. She blushed and sat still again, the warmth and tingling feeling between her legs building with the humiliation while she picked up the crayons, trying to distract herself.

"Isn't it a little awkward that she's taller than you?" she could hear Skylar ask. Matti sucked harder on her pacifier, wondering how Kiara was going to answer, if she was going to tell the truth, if she hadn't already.

She peeked behind her should in time to see Kiara shrug. "Nah, it doesn't matter how big she is, she's still just a sweet little girl. It's like you told her, things happens at different paces, and obviously her body grew up a bit faster than the rest of her. She's a little... backwards, but that's all right. She's still adorable! And she's doing her best."

Matti's blush deepened, squirming in her seat. Skylar wasn't really buying all that, was she?! She couldn't think she was some overgrown little kid who had genuine potty training issues! That was far too embarrassing! On the other hand, wouldn't it be more embarrassing for her to know the truth? At this point, it was difficult to judge, though she couldn't say she loved either alternative.

"It's too bad her hair is so short," Skylar commented. "I bet it would look cute braided!"

"Oh, that?" Kiara replied naturally. "Her Mommy told me she had an accident with the scissors, and that was the best they could do to salvage it."

Kiara was good, Matti had to admit. She hadn't hesitated for a moment with that story! Had she had that in mind, in case her friend said anything about it, or had she come up with that on the fly? Either way, it just made Matti look more immature and childish, and like somebody who belonged in these diapers, being babysat by some high schooler.

It was little wonder, with all that going on, that she wasn't able to keep her coloring in the lines. She'd intended to use that as a distraction, but she kept getting distracted from it, finding her crayons wandering. She knew there were adult coloring books, so it wasn't necessarily just something for kids, but she'd never been particularly interested in those, and this book was definitely not one of those. It was filled with very simplistic, cutesy pictures that would barely be challenging for a five year old, much less an adult.

But here she was, making a mess of them, only furthering Kiara's story about her being a kid. "How adorable!" Kiara gushed when she stood up, peering over Matti's shoulder to see what she was doing. "I just want to hang that up on my fridge!"

Matti groaned, leaning over the book, trying to hide it from view as Kiara hopped down off the sofa, walking over to her. Where was Kiara going to say she'd gotten that picture? What if Dr. Osswald saw it?! "Don't worry," Kiara giggled. "I'm not going to! I know your Mommy will want it! Maybe one day you'll make one just for me, though! Can I see it more closely?"

Reluctantly, Matti sat back down, Kiara kneeling down in front of her, reaching in. Matti thought she was going for the book, but instead, her hand shot further, giving the diaper a squeeze. "Still dry! Good job, sweetie!" she beamed, snatching up the book as she withdrew her hand, while Matti was recovering from that, picking it up to show off to Skylar. "Didn't she do a good job with this, too?"

"Wow!" Skylar exclaimed, her voice overflowing with false enthusiasm, the way Matti had heard so many older sisters doing with their younger siblings, reminding her of exactly how this girl seemed to see her. Had Kiara really not told her the truth? Had they just been giggling about something else up there? Had she been too self-conscious? "I bet you're going to be an artist one day, cutie!"

"She already is," Kiara smirked down at Matti, setting the coloring book in front of her once more. "You sure you have to go?"

"Yeah," Skylar sighed. "We'll talk later! And I'll see if I can find the rest of the diapers. I know they have to be around somewhere."

"If it's going to be too difficult, you don't have to," Kiara told her. "After this, I'm sure her Mommy will send her with some."

"Trust me," Skylar chuckled. "It's always good to have some extras. They go through more than you'd think they possibly could sometimes." She ruffled Matti's hair playfully, the older girl blushing and fidgeting bashfully beneath her. "And I bet there are some more fun toys and stuff she could borrow that my sister hasn't used in a while."

"What do you say, Mathilda?" Kiara asked expectantly.

Matti looked up at Skylar, thinking about how she was promising to provide her with baby diapers, and toys that were too childish for even her toddler-aged sister now, and how, apparently, she didn't think there was anything weird about that. How she seemed to think those were things that were totally appropriate for Matti.

What she should say was that she didn't need any of that, that she was an adult, older than either of them. What Kiara wanted her to say, of course, was, "Thank you," and that was what came out of her mouth. And, to be honest, as humiliating as it was, there was definitely a part of her that meant it. She still had a hard time believing that she fit so well into these baby diapers, and it made her feel so tiny, so helpless, but, at least divorced from what was supposed to be happening here today, she couldn't pretend that was really a bad thing.

"You are so, so welcome, Mathilda!" Skylar smiled and waved, heading out, leaving the tutor and tutee all alone again.

"S-So..." Matti gulped, staring up at Kiara, somewhat reluctantly pulling the pacifier out of her mouth. "I-I guess we should get back to work."

"Oh, I don't know," Kiara shrugged. "I'd say my work here is done. Look at what I did to you, Mathilda! I made you into the perfect twin for your dolly! And it wasn't even that hard, was it? It's almost like you wanted this."

Matti's face heated up as she shook her head. "I-I don't know what you mean! I-I don't...!"

"Please," Kiara rolled her eyes. "I know you're into all this. That's why I didn't feel too guilty doing all of it. Or about everything else that I'm going to do to you. It's all for your own good."

Matti gulped, squirming. "Wh-What else..?"

"You're a very cute baby," Kiara told her, tapping her on the nose. "But you don't know about princesses, you say you don't like dolls, you didn't know how to curtsy, and I bet there are a lot of other things you don't know about being a proper little girl, aren't there? I'm going to turn you into the sweetest, cutest little girly girl anyone has ever seen."

Matti's heart began to beat a little faster. She'd lived her whole life as a tomboy, despite how much she knew her sister wanted her to try other, more traditionally feminine things. Was this kid, this girl she was supposed to be tutoring, really going to be the one who made her do all of those things after all?! "N-No," she shook her head. "I-I'm..."

"You're doing so well so far!" Kiara interrupted, pretending not to hear. "It's like this is what you wanted all along! You're doing so well matching your dolly!"

"Sh-She's not my dolly!" Matti insisted.

"I don't know," Kiara picked up Mattix, stepping back and holding her next to Matti to look at them both at the same time. "It looks like you belong together to me."

Matti whimpered, knowing she ought to be projecting strength and maturity right now, but having a hard time with that, looking up at the doll in its babyish outfit, well aware that she was dressed exactly the same. And, as tiny and helpless as that doll looked in Kiara's hands was how she felt in the moment, too, when Kiara could tell her mother about this at any time.

"She's yours!" Matti reminded her. "She's your assignment!"

"No, she's yours," Kiara pushed the doll into Matti's arms. "She's going to help show you how you should behave. You're going to copy whatever she does."

"But..." Matti pouted, looking down at the doll. "All she does is cry, and wet her diapers, and..!"

She glanced up in time to see Kiara lowering her phone, and, a moment later, Mattix did, indeed, start to cry again. "What am I supposed to do?" Matti demanded. "Do you want me to cry?"

"Well, if she's hungry, that means you should probably have a snack, too," Kiara replied. "But maybe you ought to check her diaper first."

"She just wet!" Matti rolled her eyes. "There's no way she's..!"

She looked down at the diaper anyway, to prove her point, only to see that the diaper was, in fact, not yellow after all. There was a hint of brown, however, and, to her horror, as she turned the doll around, she saw that the color extended across the back of the diaper, making it clear what it was supposed to represent. Her defiance melted away as she stared up at Kiara, forgetting, for a moment, that, if she was standing, the girl would be an inch or two shorter than her, feeling very much like a little kid in front of her, totally at her mercy. "B-But she..." She held up the doll to show Kiara, unable to form the words. "Y-You want me to...?"

"Whatever your dolly does," Kiara smirked, "you do."

Matti nibbled her bottom lip, very much missing her pacifier now. Kiara couldn't be serious! She didn't really want her to poop her Pampers! That was insane! And, once she did that, there was no way she was going to be able to pretend she was the one in charge in their relationship ever again, if the diapering itself hadn't been enough for that! And yet, her tummy was feeling very full, so she knew it wouldn't be that hard to do.

"I-I don't hafta go," she lied. "S-So I'll just change her now, and..."

"You will not," Kiara cut her off. "She's staying like that until you join her."

"No!" Matti whined, pouting and thumping her hands against the floor, blushing as she realized she was just throwing a tantrum. She forced herself to calm down, to think rationally. "I-I don't want to mess up your grade!" she blurted out. "I-I can't go right now, and I bet if she stays in this diaper for too long, your teacher...!"

"Oh, Mathilda," Kiara chuckled. "You still don't get it, do you?" She lifted her phone, tapping on it a few times, the doll's cries instantly stopping when she finished.

Matti frowned, looking from the phone to Mattix. "W-Wait, you..? But this..."

"It was an assignment," Kiara confirmed. "Like, half the reason I even took Home Ec was because I knew they did this there! And then my partner didn't think I could handle it, so they totally took over. Nobody ever thinks I can handle anything! I would have thought you'd understand that."

Matti blushed. She had gotten a lot of the same, as a short person, and she had to admit that she had underestimated the girl anyway when she'd first arrived, just because she was so tiny, and cute.

"So, after the assignment was over, I stole the doll," Kiara shrugged. "I wanted to prove I could do it all on my own, and I could, though I couldn't really tell anyone about it, because when you're not getting graded on it, it just looks like you're playing with dolls when you do this. In order to get it to do anything, though, and to keep the teachers from being able to track it, I had to find that app that the teachers use to control the dolls. And when I did, I saw that I could also override its default program, and make it do whatever I wanted, whenever I wanted."

She pushed another button on her screen, and the doll started to cry again. "So you've been doing that this whole time?" Matti glowered. No wonder the doll had been crying so often! And no wonder Kiara always knew what to do to make it stop. She'd been controlling Matti as much as she was controlling the doll, making her do what she wanted to keep the doll happy, when she could have turned it off with a few taps of her finger.

"Playing with dolls isn't really what I wanted to do," Kiara continued. "I want to be a babysitter, but nobody thinks I'm ready, even though I'm way older than some girls who get to do it. You're not quite what I had in mind when I thought about babysitting, but you'll do for now. And you're already doing so much better. I'm sure in no time, you'll be the perfect sweet little girly girl for me. Won't you? And then I can take you out and show everyone that I know how to take care of a baby, and they'll have to admit that I'm capable of looking after their kids."

"No!" Matti shook her head. She wasn't going to be some pawn for Kiara's plan! She wasn't going to let her show her off as if she were an actual toddler! She wasn't going to stand for any of this!

"Yes, Mathilda," Kiara replied. "You're going to do exactly what I tell you, or I'm going to tell my mom what really happened while you were 'tutoring' me. How you weren't any help at all," she grinned proudly. "I mean, I don't know how you could have been, when I gave you one of my mom's old textbooks from grad school, with stuff even she had trouble with when she was taking the class, but obviously I won't tell her that part. I'll just show her one of my books and say that was the one you couldn't do anything with, and then let her know how you peed your pants, and I had to help you clean up because you were so upset you couldn't do it on your own. And I have a feeling you don't want that, do you?" Matti swallowed and shook her head. "I didn't think so," she smirked. "So be a good girl, and mess your Pampers for me, just like your dolly."