Apple Bloom and Sweetie Belle were on their way to Scootaloo's house for another sleepover. As they were making their way through Ponyville to reach their destination, the two fillies and Cutie Mark Crusaders couldn't help but think to themselves about something that was bugging them: Namely, Scootaloo's behavior in agreeing to the sleepover.

Scootaloo had been somewhat… worried, almost paranoid you might say. It was almost as if she had something she was going to great lengths to keep hidden from everypony, even her fellow Crusaders. But that would be ridiculous, right? Scootaloo had already shared so much about her life with the two, what else could there be that they didn't know about?

Well, those were thoughts for another time and place as the two fillies saw the familiar front face of Scootaloo's house come into view. They had reached their destination.

Apple Bloom took the liberty of reaching up a hoof to knock on the front door. She and Sweetie Belle expected Scootaloo to eagerly greet them, as she had done for many of their sleepovers at her place before.

Instead, however, the door was answered by Scootaloo's aunts: Holiday and Lofty. That alone struck the Crusaders as odd.

"Oh my, you're here already?" Aunt Holiday seemed to comment with concern as she looked across to her special somepony, Auntie Lofty. "You fillies must be really excited for this sleepover tonight."

Apple Bloom and Sweetie Belle nodded, and Sweetie replied. "Well, yeah. We haven't really seen Scootaloo since she got into that fight at school a while back. Since then she's been… different."

Auntie Lofty waved a hoof in response. "It's probably just your imagination, girls. Scootaloo's the same adorable niece she's always been to Holiday and I. I'm sure she's just as excited for the sleepover as you two."

"So, she's here, then?" Apple Bloom questioned.

Aunt Holiday nodded. "Yes, she's here. But…" She didn't get a chance to finish her sentence, however, as both Apple Bloom and Sweetie Belle raced past her without warning!

"Wait! Girls!" Auntie Lofty tried to call out! But it was no use, Apple Bloom and Sweetie Belle had already rushed away to Scootaloo's bedroom before either aunt had had much of a chance to react.

Holiday nervously looked across to Lofty. "This could be a problem. I hope Scootaloo's already taken care of her 'protection'."

Lofty just sighed. "If she wants to tell them, she'll tell them. The best we can do is try to be on hoof to help with any explanations. I just hope they don't get the wrong idea."

Meanwhile, an unaware Scootaloo was alone in her bedroom. She was fumbling about with her light-blue, hoofied pajamas that had been designed specifically to accommodate her "issue". Why was this so difficult for her? Why did it always give her trouble despite how many times she'd taken on and taken off these pajamas?

"Come on, you stupid things!" Scootaloo groaned as she tugged on the zipper, trying to pull it up. She was doing this specifically so that what her pajamas were designed to accommodate would be concealed. She was too afraid of leaving those… things out where her friends could see them. Just her luck she was still struggling with bed wetting. The tomboyish pegasus was sure she would've overcome it by now. Sure, the diapers were actually kind of nice to wear. But now she was at risk of exposing her well kept secret to her friends,an outcome Scootaloo wanted to avoid at all costs.

At least if Scootaloo was wearing her pajamas now, her fellow Cutie Mark Crusaders wouldn't think anything too out of the ordinary when she would need to inevitably put them on again at bed time (assuming she was careful to keep the tell tale bulge in the back well hidden).

Suddenly, the door to the tomboyish filly's bedroom swung open without warning! A horrified Scootaloo swished her tail, trying to block the view as she tried to turn so that her back was against the wall and her face was facing towards the ponies she was sure were coming in.

Apple Bloom and Sweetie Belle came trotting in, sleeping bags in tow, neither of them suspecting the sight that was about to greet their eyes. When they did see it, they had to blink and rub their eyes just to be sure they weren't somehow seeing things.

They were not, the two fillies could see their friend and fellow Cutie Mark Crusader as clear as day. And they could clearly see through her now open light blue, hoofied pajamas to see what she was trying (and failing) to keep hidden: A large, thick, white diaper (albeit one that had special wetness indicators printed on it in the form of cartoon sketches of the Wonderbolts). Said diaper was pushing their fellow filly's legs apart in a noticeable way.

Horrified, Scootaloo froze right on the spot as a raging blush formed on her cheeks! Her worst nightmare was coming true, and there was nothing she could do or say to stop it from happening!

For a moment, an uncomfortable and awkward silence filled the room. Scootaloo looked at Apple Bloom and Sweetie Belle, and they looked back at her. Nopony could speak, nopony dared to say a word. Scootaloo felt for sure she was about to die of embarrassment (assuming such a thing were possible).

At last, Apple Bloom and Sweetie Belle broke the silence as they both put a hoof to their mouths. Try as they might, they couldn't stop themselves from snickering and then outright laughing.

"Guess now we should call you Crinkleloo!" Apple Bloom teased. "Or maybe Stinkaloo if you actually use those diapers!"

"Don't call me Crinkleeloo, and I am NOT Stinkaloo!" Scootaloo roared in defiance, even as she couldn't bring herself to move. "I just need them at night, that's all. Like you two never wet the bed before?"

Sweetie Belle replied. "Not since I was in kindergarten," And she laughed some more. "But why are you wearing them now? You look so silly in them, and kind of cute, too."

Scootaloo shuddered. "I'm not cute!" She protested, even as she found that her legs betrayed her. She fell to the ground, landing on her padded plot as it let out a crisp crinkle. Tears began to well up inside of her.

Apple Bloom then taunted. "Uh-oh, did wittwe Scootawoo go boom-boom and get an owie?" She intentionally made her voice as sickeningly sweet as possible.

"It's too bad we already have our cutie marks," Sweetie giggled. "Because otherwise, we could try getting our cutie marks in babying you, Scootaloo. Although, maybe that means you'd end up getting a cutie mark in being a baby. What would that even look like? A diaper? Maybe a baby bottle?"

Try as she might, the tomboyish filly couldn't stop herself from crying and sobbing audibly. "S-stop it!" She whimpered in vain. "This is why I didn't wanna have the sleepover with you girls. I wanted to wait until I stopped wetting the bed, then I wouldn't need these diapers anymore! I mean, they do feel nice, aside from when I actually use them," She then realized what she was unintentionally confessing to as she rambled. "W-wait, I didn't mean to say that!"

But it was too late, Apple Bloom and Sweetie Belle's laughs only grew louder as they continued to stare and point.

"I can't believe it, Scootaloo! You, a big old baby!" Apple Bloom remarked in between fits of laughter. "And you actually use diapers too! No wonder you've been actin' so strange, lately."

And Sweetie Belle added. "That would explain a lot," Then her eyes happened to fall upon a suspicious looking package underneath Scootaloo's bed. Using her magic, she pulled it out and examined it. "What's this? 'Silly Filly: Diapers for big foals of all ages'?" Then she exclaimed as she saw other objects and pulled them out. "Are these your actual changing supplies, and your foal toys too? You even use a pacifier? Geeze, Scootaloo, it's like you want to be a foal again."

"I don't, really!" Scootaloo whimpered anew. "It was my aunts' idea, not mine! I just… went along with it to make them happy, really." But the lack of confidence in her voice betrayed her intentions. It seemed that nothing she said or did could stop her friends from mocking her.

Worse was to come as the tomboyish pegasus heard a faint hissing sound, and looked back to her diaper in shock and horror! A noticeable damp patch was starting to form on the back, slowly spreading across the seat as the cartoon Wonderbolts faded. She tried to cross her legs to get her body to stop, but she was powerless to control this involuntary release. It seemed like it took forever before it finally stopped, causing her diaper to become uncomfortably damp.

"Oh my Celestia! Did you actually…?!" Apple Bloom began as her eyes widened in disbelief!

Sweetie sniffed the air as a faint odor of urine began to waft by. "Did the wittwe baby just go pee-pee in her diapee?" She half cooed/half teased. "It's okay, Scootaloo. Apple Bloom and I can change you. Foals can't change themselves, you know."

"No! Please! Let me change myself!" Scootaloo sniffled, her throat starting to hurt from all the crying she was doing.

"That's quite enough, girls!" The stern, authoritative voice of Aunt Holiday sharply rapped! In the blink of an eye, she and her special somepony had entered the room. And judging by the looks on their faces, they were anything but pleased with what they had.

Scootaloo wanted nothing more than to run to her aunts and tell them everything. Yet she willed herself to be strong and resist the urge. She wasn't about to destroy what was left of her dignity if she could help it.

Auntie Lofty simply trotted over and extended a wing as the sturdy pegasus wrapped her niece in a tight body hug. "It's okay, slugger. Accidents happen. That's why you wear your diapers, so that you don't have accidents on the floor."

The tomboyish pegasus nuzzled into the hug, feeling slightly better about her situation now. "T-thanks, Auntie Lofty."

The sturdy, bulky pegasus just smiled as she helped her diapered niece to stand. "You're more than welcome, Scootaloo," Then she grabbed the wipes, the powder, and of course a fresh diaper. "Now come on, let's go to the bathroom and get you changed," As she exited the bedroom she looked to her special somepony. "I'll let you handle our guests, my dear." And soon, she and Scootaloo were out of sight.

By now, Apple Bloom and Sweetie Belle had stopped laughing. Alone in the room with a very unhappy looking Holiday, they had every reason to be afraid of this earth pony. Even if Auntie Lofty was usually the one they'd seen scolding Scootaloo for doing something wrong, they knew that Aunt Holiday could be quite stern and unforgiving when the situation called for it.

The frown on Aunt Holiday's face deepened as she approached the two fillies. "Just what in the hay was that all about, girls?" She lectured them. "You know better than to make fun of ponies for things they can't control. You wouldn't like it if Scootaloo made fun of you two for needing diapers at night, would you?"

"W-well, no, but…" Apple Bloom gulped and trailed off, the guilt and shame washing over her in an instant.

Sweetie Belle whimpered and shrank from Holiday's gaze. "W-we're sorry, Aunt Holiday, really. We got carried away, we swear!"

Aunt Holiday could only shake her head from side to side. "That doesn't excuse your behavior. You two should be better than this. I have half a mind to send you both home and tell your families about what you did. Something tells me they wouldn't be pleased to hear about this."

"NO!" Apple Bloom and Sweetie Belle shouted in unison.

Sweetie desperately pleaded. "Please, don't tell Rarity about this! Because she'll tell Mom and Dad, and they'll let Rarity punish me however she sees fit. Last time that happened, I was grounded for over a month!"

And Apple Bloom shuddered. "And if you tell Applejack and Big Mac about me, I'll be lucky if grounded's the worst thing that happens to me. I might see my chores double overnight, they might even make me clean out the pigsties, and that's if I'm lucky!"

Holiday could only sigh. "Well, you girls still did something very bad. And for that you must be punished," She began to put a hoof to her chin. "What am I going to do with you fillies?"

While Holiday was busy scolding and lecturing Apple Bloom and Sweetie Belle, Lofty was in the bathroom, helping Scootaloo get changed.

"Well, I guess the secret's out now, more or less." Scootaloo commented as her soggy rump was wiped clean.

Lofty just replied. "They were probably going to find out sooner or later, slugger. Holiday and I hoped they would be more understanding than that," She shook her head from side to side. "I guess they just don't know any better."

Scootaloo then questioned. "What do you think Aunt Holiday's going to do, Auntie Lofty?"

Auntie Lofty shrugged as she sprinkled some foal powder on her niece's rump, then taped her up into a fresh diaper and helped her to stand. "I honestly don't know, Scootaloo," As she then washed her hooves in the bathroom sink, she commented. "Me personally, I'd make them go through what you went through. Maybe even take away their bathroom privileges for a while."

At that the tomboyish pegasus gagged. "Even for number two? That would be so gross! You'd really want to change them even if they did that?!"

The bulky pegasus mare remarked. "If it helped them learn not to do it again, I wouldn't mind it. Besides, if they asked really nicely, I'd let them use the potty. And a little bit more foal practice for Holiday and I would be nice. I don't foresee us having foals anytime soon."

"Aunt Holiday probably wouldn't do that," Scootaloo replied as she exited the bathroom with Auntie Lofty a moment later. Then she snickered. "Although, it would be nice to get a little bit of payback after what they did to me. A little embarrassment would make sure they'd never think of telling anypony else about any of this."

Auntie Lofty was quick to warn. "Now slugger, don't you go getting any ideas. You need to be the bigger pony in this situation. Don't forget, using the potty is a privilege, not a right. And you can easily lose that privilege under Holiday and I's care if you misbehave." That quickly put an end to any ideas her niece might have about payback.

The two pegasi returned to the bedroom just as they heard Holiday wondering aloud. "What am I going to do with you fillies?"

It was then that an idea came into the mind of Lofty, still remembering her conversation with Scootaloo. She trotted up to her special somepony and whispered the idea into her ear.

Holiday was more than a little uncertain about the proposal if her tone of voice was any indication. "Lofty, are you sure we should be doing that? Remember how that worked out with Scootaloo?"

Lofty replied. "She might not mind it now, but she certainly didn't like it when we started out. I think it's a good way to make sure these two fillies learn their lesson."

Holiday appeared to reluctantly relent. "Very well, Lofty. But if they do anything in their diapers, you're the one who will have to change them."

Lofty nodded. "I understand."

Apple Bloom and Sweetie Belle gulped anew as they both asked. "You mean…?"

Aunt Holiday firmly nodded. "I do. You two fillies are going to be subjected to the same treatment we once subjected Scootaloo to. You're going to be diapered and treated like little foals for the duration of this sleepover. You'll have to abide by the rules Lofty and I set down for you. As long as you do that, we won't tell your families about this incident."

"Do we have to?" The two Crusaders whined, understandably hesitant.

"Yeah, unless you want Aunt Holiday and Auntie Lofty to tell your families and make them punish you!" Scootaloo pointed out as she couldn't help but snicker. "So, what's it gonna be, girls?"

Reluctantly, after looking across to each other for a moment, Apple Bloom and Sweetie Belle both agreed to their punishment at the hooves of Scootaloo's aunts.

"Guess bein' treated like a foal for a day or two beats whatever we'd have to face back home." Apple Bloom commented.

Sweetie Belle nodded in agreement. "Yeah. As long as this just stays between us, I guess Apple Bloom and I will go along with the punishment," Then she nervously asked. "Um, do we have to actually… use our diapers?"

"If you want to," Lofty pointed out, "If not, you just have to ask for permission to use the potty. And of course, you can't change yourselves, I have to do it," Then she smiled. "Now, let's get you girls diapered up. Then you can play with Scootaloo until dinner time." And so the punishment began.