Picture by&nbsp;<a target="_self" href="https://www.deviantart.com/rosie-brs" ><img class="avatar" width="50" height="50" src="https://a.deviantart.net/avatars/r/o/rosie-brs.gif?4" alt=":iconrosie-brs:" title="Rosie-BRS" /></a>, who has a Patreon&nbsp;<a class="external" href="https://www.deviantart.com/users/outgoing?https://www.patreon.com/RosieBRS">here</a>&nbsp;if you'd like to have the chance to get rewards like this from her!<br /><br /><br />"How are you doing, sweetie?" Mckenna asked, giving the back of Sierra's shorts a loving pat. The older girl blushed, listening to the crinkle that only got louder as Mckenna's hand slid downwards, into a squeeze. "Sierra!" she teased. "Wet again already?"<br /><br />"No!" Sierra pouted grumpily, without thinking. It was her automatic response to that question, although by know, she really should know better than to let herself say it when somebody was literally in the process of checking her.<br /><br />"Are you fibbing?" Mckenna raised an eyebrow. "Because something has definitely happened in your pants." Without asking, she began to unbutton Sierra's shorts, sliding them down. "Look at that! I know a soggy diaper when I see one! Did you not know? Maybe we ought to keep you in these a little..."<br /><br />"No!" Sierra shook her head desperately. "I-I knew," she admitted. "Sorry."<br /><br />"Aww, it's okay," Mckenna pulled her into a hug. "Really, it's probably a good thing, right? Because it's just about been twenty-four hours now, and it would have been a waste to take you out of this diaper without you having used it."<br /><br />"R-Right," Sierra nodded, willing to play along. "Th-That's why I did it. Wouldn't want to be wasteful."<br /><br />Mckenna smiled. "You're always looking out for me. You're such a good big sister."<br /><br />Sierra didn't particularly feel like a big sister, standing there with her shorts around her ankles, and a damp diaper on display, having spent the whole day padded and not being allowed to use the toilet, but the term did still stroke her ego enough to bring a smile to her face.<br /><br />"I-I try," she said. <br /><br />"Don't sell yourself short, Sierra!" Mckenna told her. "Only the best big sister would do this! You did all this to show me what the consequences of my actions would really look like, right?"<br /><br />Sierra fidgeted, thinking about how difficult it had been all day, not to mention the night before, to find a comfortable position to sit in, thanks to her still sore bottom from that spanking she'd been given. If it had been her plan, that really would be quite the sacrifice just to be an example.<br /><br />"E-Exactly," she agreed. "A-And you're a very clever little sister to see that!"<br /><br />Mckenna grinned. "I try. Now, you you want to teach me any more lessons, or should we get you out of this thing?"<br /><br />"Out!" Sierra couldn't help exclaiming, more than ready to go back to her panties.<br /><br />"Okay, okay," Mckenna giggled. "Hop up on your bed!"<br /><br />"Umm, I can..." Sierra blushed.<br /><br />"Up you go!" Mckenna interrupted her, almost as if she didn't want to let the older girl tell her that she could do this part herself. "Let's see here." She pulled open the top drawer of Sierra's dresser, letting out a delighted squeal. "Look at these! I think I had some of these when I was younger!"<br /><br />Sierra squirmed, trying not to be too offended by that. Mckenna probably didn't mean anything by it, after all. "Th-They were on sale," she stammered.<br /><br />"We have to do these Hello Kitty ones!" Mckenna declared, taking out a pair and holding them up, admiring them, then turning around. "Why aren't you up on your bed?"<br /><br />"S-Sorry." Sierra scrambled up onto the changing pad that she'd gotten very accustomed to that day, letting Mckenna open up her diaper and wipe her dry before pulling the pink undies over her feet, giving them a tickle while she was down there. "N-Now, let this be a lesson to you," Sierra said, with all the authority she could muster as she tugged her shorts up over her pink panties, and bottom. "You don't want me to do all that to you, do you?"<br /><br />"No way," Mckenna chuckled, looking down at her.<br /><br />"Then don't let your drinking get out of control," Sierra lectured, as if that was something she knew anything about herself.<br /><br />"Yes, ma'am," Mckenna gave her a mocking salute. "Here, why don't I take your diapie out to the garbage so you can brush your teeth and get to bed?"<br /><br />Sierra blushed and nodded.<br /> <br />Unfortunately, it really hadn't been long since Sierra had gotten out of full-time diapers last, and spending the day in them again had only made it harder for her to adjust to being in panties again, so it was hardly a surprise when she woke up to a wet spot in her underwear.<br /><br />Thankfully, she was awake before Mckenna, so she was able to toss them, and the sleepshirt she'd gone to bed in, into the laundry hamper and take a nice, long shower to talk herself down from panicking. She'd be all right now that she was awake. Her control wasn't that weak that a single day would be enough to destroy it!<br /><br />She was feeling much better once she stepped out of the bathtub, wrapping herself in a big, fluffy towel and padding her way down the hall to her room, only to open the door and find Mckenna there, changing pad at the ready. Sierra froze in the doorway, wanting to turn around and scurry away, but, of course, she knew that wasn't going to do her any good in the long run, unless she was going to spend the whole day naked except for a towel, and constantly avoiding Mckenna.<br /><br />"Wh-What is that for?" she asked, remembering what had happened last time she'd asked that, but hoping that, somehow, this time, it would be different. "D-Did you go out and party after I went to bed last night?"<br /><br />Mckenna smirked. "Hardly. I did find something interesting in the laundry, though."<br /><br />Without thinking, Sierra blurted out, "You don't know those were from today!" A few more seconds of thought might have been enough to tell her that it would be wiser to play dumb instead, act like she didn't know what Mckenna was talking about. More than likely, however, nothing she did would have made much of a difference.<br /><br />"What are you talking about?" Mckenna chuckled. "Yes, I do. I put you in those panties last night, remember? And already this morning, they were soggy. You know what that means." She snapped a diaper open. "Two strikes, Sierra."<br /><br />It wasn't fair! Sierra had just spent all of yesterday in diapers! She hadn't even had the chance to use the toilet to do any more than empty out the rest of her bladder before her shower! She'd assumed she could wait a little longer, after having held it all of the day before, but there was no way she could make it a whole other day! "Mckenna!" she whined, stomping her foot, tears springing to her eyes.<br /><br />"Oh, I know," Mckenna scooped her up, whisking her over to the bed, the towel falling off, leaving Sierra naked to be set down on the waiting diaper. "But these are your rules, Sierra."<br /><br />"F-For you!" Sierra felt she had to point out again, the words otherwise making it sound too much like the rules had been made for her, to keep her in line, instead of the other way around.<br /><br />No matter who the rules had been intended for, it was Sierra who was getting powdered and taped into the diaper, Mckenna cheerfully picking out a pair of cute denim shorts with heart-shaped pockets for her before revealing, "Your panties last night reminded me of something. I thought your punishment idea was so good, I thought I'd add to it, and I bought myself some outfits that I'd have to wear. But, since you were the one who broke the rules first, and since you clearly like Hello Kitty, too, I thought you ought to wear them."<br /><br />Sierra blushed, looking up at the shirt Mckenna was holding up. It was white, with pink around the edges of the scalloped arms and hem, and Hello Kitty smiling at her from the chest. It definitely looked childish, though she did get a little comfort knowing that Mckenna had bought it for herself, so it was bound to be at least a little big on her.<br /><br />Except, somehow, it wasn't. Weirdly, it fit her exactly the way it seemed intended to, stopping short of the waistband of her diapers, which were poking up out of the waistband of her shorts, leaving no question as to what she had on. "Th-This is yours?" Sierra asked, tugging at the hem self-consciously.<br /><br />"You'll stretch it out," Mckenna scolded, swatting her hands away. "You're right, though, I must have ordered the wrong size. I guess it'll have to be yours, huh?"<br /><br />Even trying to think about it the way Mckenna had put it the day before, with her doing all this as an example for the other girl, it was hard not to feel like a toddler, waddling along behind Mckenna down to the kitchen to make breakfast, scurrying around the kitchen, up and down on step-stools, to fetch things to help the younger girl cook. <br /><br />That was nothing compared to what happened after they'd eaten, however, and, while Mckenna was playing on her phone, Sierra felt a pain in her tummy that told her that her time was almost up. As carefully as she could, trying to keep her crinkling to a minimum, she slid off the sofa, creeping through the house to the nearest bathroom. She tip-toed down the hall, seeing the door get closer and closer, feeling a sense of relief that she could at least spare herself this indignity until...<br /><br />"Where are you going?" Mckenna tapped her on the shoulder, making her jump. <br /><br />"Wh-What do you mean?" Sierra chuckled nervously, playing dumb. "J-Just going to my room to get something, that's all!"<br /><br />"Oh, okay!" Mckenna took her by the hand. "Let's go, then!"<br /><br />"N-No, by myself," Sierra pouted, trying to pull her hand free as Mckenna started to drag her down the hall, away from the bathroom.<br /><br />Mckenna shrugged. "All right, whatever. I'll wait here for you." She leaned against the bathroom door, arms crossed. "Go on," she urged, when Sierra gawked up at her unhappily.<br /><br />Sierra told herself to calm down. There were other bathrooms in the house, after all, and if Mckenna was stationed here, she couldn't guard them, too. Of course, she could have admitted what was happening, and begged Mckenna to make an exception to the rules for this, but the thought of that was too mortifying to seriously consider.<br /><br />"Okay," she nodded. "Be back in a minute." She marched away down the hall, but she couldn't even make it all the way there before another cramp hit her and, to her horror, she felt her knees start to bend, her diaper crinkling as something warm and mushy began to ooze its way inside before she could start it. She'd hesitated too long, just assumed she would be able to get into the bathroom with no issue if she was quiet enough, and now, it was too late!<br /><br />"What's going on there, Sierra?" Mckenna asked, the little witch too pre-occupied to answer, or do much more than grunt as the younger girl approached from behind. Sierra blushed deeply as she felt the rear waistband of her diaper being tugged outwards as she was given a diaper check at the worst possible time. "Sierra!"<br /><br />"S-Sorry," Sierra managed to squeak out, as her diaper struggled to expand beneath her tight, at least with the extra padding underneath, shorts. She could feel the mess spreading all throughout her diaper, making certain that no matter how she moved, she'd get a fresh, squishy reminder of her accident.<br /><br />It was a very meek Sierra who finally was able to stand up, knees shaking, and turn to face Mckenna, her facade of the big sister shaken to the core. "I know you're trying to show me how bad it can be," Mckenna sighed, "but this is not something I'd ever do. I guess we didn't really talk about this, did we?"<br /><br />Sierra gulped. She definitely couldn't imagine the gorgeous young woman standing in front of her being in her position. <br /><br />"It almost makes me wonder, Sierra. Do you need these diapers? Is that it?" Mckenna knelt down, as if she were talking to a small child. "I won't be mad if you do, sweetie, as long as you tell me the truth."<br /><br />Sierra squirmed in her stinky diaper, the mass shifting, making her feel so very small and helpless. "N-No," she sniffed. "O-Of course not!" She was the big sister here, after all!<br /><br />"All right," Mckenna shrugged. "If you say so. You're still on your second strike, then, but I have to say, this," she reached out, giving Sierra's bulging shorts a pat, "is almost enough to count as the third strike in and of itself."<br /><br />"N-Nuh-uh!" Sierra insisted. "The rules don't say anything about this! Th-They just say we have to wear diapers for a day, and this is part of it!"<br /><br />"If you say so," Mckenna said. "I mean, I assumed this was something we'd suspend the punishment for if it came to it, but I guess that wasn't what you thought when you made the rules? That's fine with me, if it's what you want. No potties at all if you're in diapers, I'll add that to the rules." <br /><br />That wasn't Sierra's intention, and she opened her mouth to say so. Obviously, she hoped she wouldn't get any more strikes, certainly not before the month was up, so hopefully it wouldn't affect her, and if she admitted this was purely an accident, it made her look so much more infantile, she almost couldn't stand it. "O-Okay," she gulped, hoping she wasn't making a huge mistake, like she already had by not just telling Mckenna she had to poop, and presumably being allowed to use the toilet instead of filling her Pampers in front of her.<br /><br />"All right," Mckenna gave Sierra's mushy bottom one more pat, "let's get you cleaned up, stinky girl."<br /><br />~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~<br /><br />"What are you up to?" Mckenna asked, Sierra immediately dropping the girl's phone, turning her attention back to the television screen.<br /><br />"J-Just watching the movie," she said innocently.<br /><br />Mckenna tilted her head, clearly unconvinced, as she walked over to the sofa, drying her hair off with her towel. "Okay, whatever," she shrugged. "Isn't this usually when you go to bed?"<br /><br />Since she'd lost her panties in the morning, almost as soon as she'd woken up, that meant sleeping in diapers again, which Sierra wasn't particularly pleased about. She didn't resist, however. "You're right," she nodded. "Night-night!"<br /><br />Mckenna caught her on the way past, giving her diaper a check with a pat, and a peek in the back, but she'd just changed Sierra before taking her shower, so she was dry. Sierra toddled to her room, smiling to herself, thinking about the party invitation she'd left open on Mckenna's phone so that it would be the first thing she saw.<br /><br />For as big of a party girl as Mckenna had said she was, it had taken quite a bit of scrolling through her social media to find one of her friends talking about having a party that night. And, with her big sister tucked away in bed already, there was nobody to talk her out of it, like Sierra had done in the past.<br /><br />Sierra smiled to herself, snuggling up under her covers, trying to decide if she should change into her panties before she checked on Mckenna the next morning or not. She didn't want to make it look like she was breaking the rules, but if Mckenna took the bait, she'd probably be sleeping well past the twenty-four hour mark on Sierra's punishment. And Sierra knew that she'd feel more authoritative, telling Mckenna it was her turn to be padded for the day, if she was out of diapers herself.<br /><br />To her surprise, Mckenna was the one to wake her up the next morning. "Rise and shine, sleepy-head!" she chirped. "Let's get you out of that soggy diaper!"<br /><br />"I-It isn't..." Sierra pouted, luckily stopping herself short, wiggling her bottom to find that she wasn't correct. The past few nights were really not doing her potty training any favors! But at least she'd been in diapers this time, so it couldn't be used against her. "Okay."<br /><br />She stepped aside, letting Mckenna set up the changing station while she yawned and tried to finish waking up. "You're up early," she pointed out. <br /><br />"I decided to head to bed not long after you did," Mckenna replied. "You set such a good example for me, I thought I might as well copy you. You always seem so rested in the morning!"<br /><br />"Oh." Sierra felt like she should be flattered, though, instead, she was disappointed her trap had failed. "There wasn't anything else you wanted to do?"<br /><br />"Not really," Mckenna shrugged. "It's been close enough to a day, don't you think? Why don't you wear these cute flower panties?"<br /><br />Sierra had a feeling Mckenna was picking them out for her so that she couldn't pull what she'd tried the day before, and pretend she'd been wearing a different pair if anything happened. She didn't think anything would, but she couldn't deny that she was nervous considering, "This is your last chance," as Mckenna reminded her, helping her into the undies. "I'm sure it's nothing for someone as mature as you to worry about, since you can easily go a full month without any accidents, but just so you know, I've definitely learned my lesson. You don't need to be an example for me anymore." She winked, Sierra nibbling her bottom lip, wondering if maybe she knew a little more than she was letting on.<br /><br />"Hey!" she squealed, her suspicions seemingly confirmed when, out of nowhere, while Sierra was running back and forth and fetching ingredients for her, Mckenna grabbed the hem of the smaller girl's dress, lifting it up.<br /><br />"Just checking," Mckenna teased, letting the skirt flutter back into place. "After you tried to hide your panties in the hamper yesterday, I can't be too careful."<br /><br />"I won't do that again," Sierra promised. But that didn't seem to be enough for Mckenna, who checked her again after breakfast, when Sierra was gathering up dirty dishes to take back to the kitchen. <br /><br />"Fine," Sierra huffed. "If you can do it to me, then I can do it to you!"<br /><br />"Sure," Mckenna shrugged. "That's only fair." She unbuttoned her tight jeans, sliding them down, exposing her skimpy thong, Sierra blushing at the sight of it, and how much more grown-up it looked than her silly, flower-print panties, much less the diapers she'd been wearing for most of the past couple days! "What do you think, big sis? Do they pass your inspection?"<br /><br />Sierra wished she could say no, to give herself an excuse to put Mckenna back in diapers, since she was, after all, who those rules had been made for, but she knew she couldn't, not unless she just wanted to be petty and do it for no reason. Like it or not, she'd earned her diapers, and, as far as she could tell, Mckenna hadn't. "Yeah, I guess," she sulked.<br /><br />She could always do a little spell to help Mckenna along, but that was definitely cheating, and, as hard as it was to admit, Mckenna had been playing fair and square. Instead, all she could do was pay very close attention to her bladder's signals, and hurry to the bathroom as soon as she thought she might feel something, so that whenever Mckenna did check her, she'd have nothing to find.<br /><br />At first, Sierra would check Mckenna back right away, but, with as self-conscious as the other girl's underwear made her feel, and as vindictive as she knew it must make her look, she stopped, though she did still do it when Mckenna came back from the bathroom, hoping that maybe she hadn't wiped as well as she should have, or had been a moment or two late making it to the toilet. That never seemed to happen, although thinking about it did make Sierra paranoid one of those things would happen to her.<br /><br />She was starting to think that it was hopeless when Mckenna announced, "I think I'm going to go out tonight."<br /><br />"Really?" Sierra sat up a little straighter.<br /><br />"Do you think it's a bad idea?" Mckenna asked. "I just thought that it's been so long, and there was a party yesterday that I didn't go to, but it made me think about how much I miss it. But if you don't think I should..."<br /><br />Sierra knew that Mckenna had brought her in to help discourage her from this sort of thing, but it was exactly what she needed to turn the tables. "No, you're right," she said. "I mean, you've seen my example of what can happen if you don't control yourself, so maybe it's time to see if that did any good."<br /><br />Mckenna smiled. "That is such a good idea, Sierra!" But when she was on her way out, she said, "Don't wait up!" which, to Sierra, meant that she knew how unlikely it was that she would be able to fully resist her old ways. <br /><br />Sierra felt a little guilty, staying up, wanting to catch Mckenna right away, before she could make an attempt to hide the evidence. She didn't know why, since it wasn't like she had a bedtime, really, just a time that she normally went to bed on her own. <br /><br />Not having Mckenna there, ready to inspect her undies at any moment, did make her relax a little, and the longer she waited, the more certain she was that, by the time she got home, Mckenna would have earned her first strike, putting them on slightly more even footing, so she started to ignore her bladder's warnings, not wanting to miss Mckenna sneaking in.<br /><br />So it was really not surprise when she woke up suddenly, not having remembered going to sleep, to the feeling of a diaper being wrapped around her waist. "H-Hey!" she whined sleepily. "What are you doing?!"<br /><br />"I came home and you were asleep on the couch, in the middle of a giant wet spot," Mckenna told her, not sounding the slightest bit tipsy. "And you know what that means."<br /><br />"No!" Sierra shook her head. "I didn't! It's not true!"<br /><br />Mckenna sighed, continuing to tape up the diaper, ignoring Sierra's futile attempts to squirm away, not stopping until it was done. Only then did she help Sierra to her feet, taking her by the hand, leading her through the house in her t-shirt and diaper, making her look at the wet spot on the couch cushion, and then the wet shorts and panties in the laundry hamper, leaving no doubt of what Sierra had done.<br /><br />Mckenna didn't seem drunk, but Sierra had to do something, to cling to some shred of hope. "W-Well, I should check you, too!" she pouted, even knowing that, now that she was padded up, the sight of the other girl's undies were going to make her feel more embarrassed than they already had. Especially when, inevitably, they were completely dry.<br /><br />"Wow, Sierra," she teased, leading the sniffling girl back to her bedroom. "You had a whole month to get those three strikes, and you did it in pretty much the shortest time possible. I guess you really earned these diapers, huh?"<br /><br />"No, I didn't!" Sierra glared at her grumpily.<br /><br />But Mckenna kept her in diapers for the whole next day, and, after doing a load of laundry, she dressed her back up in the Hello Kitty shirt, this time pairing it with a matching diaper cover, white with three rows of pink ruffles on the back, technically hiding her diaper, other than the waistband peeking out the tiniest bit, but, in reality, not fooling anyone as to what was underneath it.<br /><br />And, once she was all dolled up, Mckenna took her to her bedroom, setting a large box down on the floor, marked, 'Donations.' "Be a good girl and put all your panties into here for me," she ordered. "If I find any missing, I'm going to have to get the hairbrush, so no cheating."<br /><br />"Th-This isn't fair!" Sierra pouted. <br /><br />"It's the rules," Mckenna told her. "You had your three strikes, now you're losing your panties until I decide that you're ready to try them again."<br /><br />Sierra, in her babyish outfit, looked up at the younger girl, stomach twisting as she started to wonder how long that was going to take. Mckenna smiled, standing by and watching as Sierra pulled all the underwear out of her drawer, waiting until it was empty to set the package of diapers into her underwear drawer instead. "Much better," she declared, one final confirmation that Sierra had better get used to her fate. "Now, into the box with them!"<br /><br />"I don't wanna!" Sierra stomped her foot, prompting Mckenna to leave the room for a moment, returning with the dreaded hairbrush, holding it silently, though the threat came across loud and clear. Sulking the whole way, Sierra poured her panties into the donation box, watching them fall, almost in slow motion, giving her time to think about how she wasn't going to be able to wear any of them ever again. It was all diapers for her, all the time, until Mckenna said differently. All crinkly, bulky, squishy diapers, like a dumb little toddler who hadn't learned to use the potty yet, not at all the mature grown-up that she was meant to be for Mckenna, to be an example for her. She wiggled in place, listening to her diaper crinkle, glancing over at the package sitting in her open underwear drawer, only the sight of the hairbrush keeping her from launching into a tantrum at how unfair this all was.<br /><br />Sierra assumed that when Mckenna made her carry the box of undies out to the garage, it was merely so she could put it in the car, but, after she'd done that, Mckenna picked her up, putting her into the back seat and buckling her in, humiliating outfit and all, driving her to hand over the box of donations herself.<br /><br />Sierra tried to keep ahold of the box, both because of what it had inside, and because it distracted, somewhat, from what she was wearing, but the woman at the thrift store easily pulled it from her grip, taking it away to the back room, whisking away every last pair of her big girl panties.<br /><br />"Thank you, cutie," the woman said, condescendingly patting her on the head. "You're such a good helper for your big sister."<br /><br />"N-No!" Sierra shook her head, tugging at her shirt, trying in vain to hide her diapers with it. But she couldn't quite bring herself to tell the woman that she was the big sister here.<br /><br />"Look, Sierra," Mckenna smiled, taking her by the hand. "Look what they have! Isn't that a lucky coincidence?" She led Sierra over to a large crib, more than big enough for her to sleep in. <br /><br />"Mckenna," Sierra gulped, staring up at her. "I-I don't need that!" It was bad enough that she was going to be stuck in diapers, with no underwear to change into even if she could find a time to do it when Mckenna wasn't watching her like a hawk. She didn't need to have a crib, too, to emphasize how far she'd fallen even further!<br /><br />"I'll tell you what," Mckenna knelt down in front of her. "If I check you right now, and your diaper is dry, then I'll believe you."<br /><br />Sierra tried to wiggle away as Mckenna's fingers moved towards the legholes of her diaper cover, the bemused look on her face making it clear that she knew what that meant. "I don't suppose you have any more pieces to go with this, do you?" Mckenna stood up, not even bothering to check Sierra. "A changing table would be especially helpful."<br /><br />"You're in luck," the woman told her. "We just got in a full set."<br /><br />"Well," Mckenna squeezed Sierra's hand, "isn't that wonderful?"<br /><br />~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~<br /><br />Sierra had almost drifted off, leaning against Mckenna's side, ready for bed in a onesie that had supposedly been for Mckenna, yet held Sierra's diapers against her bottom with the perfect snugness, when she heard the doorbell ring. She sat up, looking around in confusion.<br /><br />"It's all right," Mckenna chuckled. "Just sit here and watch your cartoons." She got up, heading to the front door, returning with a pair of girls her age, who immediately squealed, rushing over to the blushing Sierra.<br /><br />"Oh, my God!" one of them exclaimed. "Your baby sister is so cute!"<br /><br />"I-I'm not..." Sierra started to protest, but the idea of pointing out that she was the big sister here seemed pretty absurd.<br /><br />"Is she going to stay up and party with us?" the other girl gave Sierra's tummy a tickle, Sierra unable to resist giggling.<br /><br />Mckenna rolled her eyes. "What kind of a big sister would I be if I let her do that? It's almost her bedtime."<br /><br />Sierra stared up at her in surprise. It had been one thing to hear her friend say it, and for Mckenna not to correct her, but having Mckenna call herself the big sister was something else entirely. Something else that Sierra still couldn't exactly deny, considering how many times Mckenna had changed her diapers after those three strikes, and how many more she likely would before, according to the agreement they'd signed before Sierra moved in, Sierra was allowed to even think about moving out.<br /><br />The doorbell rang again, Mckenna heading back out. Immediately, Sierra turned to the girl's friends. "C-Could you make sure Mckenna has lots of fun tonight?" she asked. <br /><br />"How sweet," one of the girls smiled. "You want your big sis to have a good time?"<br /><br />"Y-Yeah," Sierra nodded, trying not to let her ulterior motives show. She may have had all three of her strikes already, but that didn't mean Mckenna couldn't get some of her own. Surely, if she wound up back in diapers, too, people wouldn't automatically assume Sierra was the little sister. "Just make sure she has lots to drink."<br /><br />"We can try," the other girl shrugged, "but that's not really how Mckenna gets down. She's always been very responsible about that kind of thing."<br /><br />"Almost boringly responsible," the first girl added. "Maybe now that she has you to look after, she'll stop trying to be mom-friend to everyone else."<br /><br />"Seriously," the second girl rolled her eyes. "She's needed a little sister for a long time."<br /><br />"B-But..." Sierra nibbled her lip, staring over at Mckenna as she returned, this time with a cute boy that made Sierra blush, feeling his eyes on her and her childish outfit. That couldn't be true! The whole reason Mckenna had wanted a roommate was to learn how to be a proper, mature grown-up from them! <br /><br />"Hey," one of the girls said, giving Sierra another tummy tickle. "Is this the girl that weird cheerleader told you about? I remember she said she was blonde, and just what you were looking for."<br /><br />Cheerleader?! Sierra squirmed, everything suddenly coming together. That wasn't much to go on, but she had no doubt that, as hard as Sierra had tried to get away from her, that it was Haley that had set this all up, that had found someone who was desperate to have somebody to look after, then told her everything she needed to say to get Sierra to dig her own grave. She probably hadn't had that nursery ready to go in the thrift store, because Sierra suspected Mckenna herself was behind that, but who knew?<br /><br />"I'm sure I don't know what you're talking about," Mckenna smirked. "We were just lucky to find each other. Now, come on, Sierra, it's time to get you into your crib for the night while the big kids have some fun."<br /><br />"B-But I'm a big kid!" Sierra pouted as Mckenna picked her up, resting her on her hip. "I-I mean, a grown-up!"<br /><br />"Sure you are," Mckenna gave her a bounce. "That's why I'm going to have to change your soggy Pampers before I tuck you in." Sierra sniffled, squirming helplessly in the younger girl's grip, certain now that there was no way she was going to be able to get Mckenna into diapers alongside her, even for one day, and that there never had been, no matter what the girl had told her at their first meeting. "Don't cry, baby sis," Mckenna bounced her again. "We'll have lots of fun together tomorrow morning! Babies like you just need way more rest than big kids like us."<br /><br />"But I'm not even tired!" Sierra whined, proving how much of a lie that was, and how big of a baby she really was, despite her protests, by falling asleep on the changing table, before she even got to her crib.