The Crinkle Cadet

by Twinkie Hoof

Rating: mature
Tags: Rainbow Dash, Wonderbolts, Spitfire, Lightning Dust, Slice of Life, My Little Pony: Friendship is Magic, Soarin
Length: 7853

Spitfire catches Rainbow Dash having some private playtime, and decides to make it not so private.

Cover-art by thestargrazer
Warnings: diapers, ageplay, diaper use (wetting)

A one-shot of diaper fluffy fun.

Rainbow Dash is indulging in some a bit of private playtime, her door unlocked to add a thrill which suddenly becomes all too real when Spitfire walks in on her. Her private game is about to become much less private, and a lot more fun.

Published 2014-06-13 03:50:05 UTC
Last updated 2014-06-13 03:50:05 UTC

The Chapter

“Cadet Dash, I needed to talk with—”

Spitfire blinked, staring at the blushing, diapered mare who looked like she wanted to sink into the floor. A long, long silence stretched between the two of them. Rainbow Dash’s face resembled a tomato, or a mannequin after Pinkie got ahold of it and red paint. Not that many mannequins had thick diapers decorated with smiley cartoon clouds. They certainly looked happier than the mare wearing them did. Rainbow Dash’s face was frozen in a look of horror, the blazing red beneath her fur making her look a bit purple. Her cadet’s uniform ended just where the diaper started, which the stunned Spitfire found somehow fitting. She blinked again, shaking her head for a moment to make sure she was seeing what she was seeing.

“...you,” she finished, lamely.

That kicked Rainbow Dash’s brain-cells out of standby mode and back on. She tried to jump and run and fly all at once, which mostly just left her scrambling madly and falling on her face. Spitfire watched from the doorway, unsure about what to think but amused.

“C-captain! I, uh, I was just….” Rainbow Dash pulled the cover off her bed, wrapping it around her waist. “Just...a bet! I had to wear one, for a bet, and now I’ve won, so I can take it off!”

Spitfire raised an eyebrow. “Just one?”

“Just one!” Rainbow Dash nodded frantically. She realised Spitfire was looking past her now, and slowly turned her gaze to the bed.

“So I guess you don’t need that whole pack of them right there, do you?” Spitfire kicked the door shut as she stepped into the room with an amused look on her face. The sound of it shutting made Rainbow Dash flinch. “I gotta admit, that’s impressive. That you’d have powder, and cream, and a changing pad. For a bet.”

The items exposed by Dash’s bedsheet, scattered across her bed when she tore it off, sat there accusingly. At least, that’s how they looked to Rainbow Dash. Accusing. Evil. Her eyes widened.

“Discord! He’s playing a prank on me. Yeah, that’s it. You know Discord, loves his crazy jokes,” she said with an excessively fake laugh. Rainbow kicked at the sheet with her back hoof, trying to push the sheet over her stash. “Pretty funny, r-right?”

Spitfire didn’t say anything else. She just looked at the embarrassed cadet. A flat, frank look that made it clear she didn’t buy it for a second. In fact, she felt slightly insulted that Rainbow Dash thought that she could ever fall for it.

“Hilarious,” Spitfire said. She took a step towards Rainbow Dash and enjoyed the way the rainbow-maned mare tried to retreat, keep her diaper hidden and cover the changing supplies, all at the same time. She felt a little guilty for enjoying it so much.

“I know! So funny! I should, you know, change out of it now, so...” Rainbow Dash gave her a weak, shaky smile.

The not-so-subtle ‘please leave and forget this ever happened’ was followed by silence as Spitfire didn’t so much as take one step back. Spitfire let the silence drag on. She didn’t actually enjoy making cadets squirm — most of the time — but Rainbow Dash had lied to her face. It hadn’t even been a very good lie! Spitfire respected honesty and good lies. She let Rainbow Dash cringe for a few moments longer before speaking, by which time she was less than a foot from the trapped Wonderbolt cadet.

“Actually, I don’t know,” she said conversationally, walking past Rainbow Dash to inspect the supplies. She could feel Rainbow Dash’s embarrassed gaze from her side, and the rustle of her sheet as she trembled in what was probably the most humiliated fear this side of Canterlot.

“D-don’t know?” Dash squeaked. That alone nearly made Spitfire smile. Nothing like making a confident pony nervous. Making her actually squeak when she talked…it was like making a snake meow.

“If you should change out of it,” the captain clarified. Her tail whipped over, slapping the sheet out of Rainbow’s hooves. “Not yet. Don’t.”

The last word was a command, and Rainbow Dash stopped halfway to reaching for the sheet. She froze, looking up at Spitfire and gulping loudly. “Captain?” Her voice quivered. Taking a breath, she tried again. “Captain, I don’t understand.”

Spitfire smirked without looking back. “I know,” was all the answer she gave.

Spitfire stopped inspecting the changing supplies, leaving the bottle of powder, the rash cream and large ‘Fluffy Foal’ brand diapers pack where they were. Now she inspected Rainbow Dash herself. Wearing her uniform, which didn’t clash with the diaper all that much, and with her bright blush she looked...cute. Spitfire was loathe to use the word, but it was true. Rainbow Dash looked adorable.

“So,” Spitfire began, trying to distract herself from the relative filly-like cuteness of the cadet. Her mouth trembled as she tried to control her look of amusement. “Diapers. ‘Fluffy Foal’ diapers. I don’t think I’ve ever seen them in the supermarket before.”

Rainbow Dash managed to shake her head. “No…uh...Spitfire, I–”

Spitfire held up a hoof to silence her. “Shush now sweetie.” Spitfire blinked in surprise but covered the feeling quickly. Why did I call her that? Ugh.

Ears going flat at the reprimand, Rainbow Dash closed her mouth and kept it shut as Spitfire looked her over. When the older mare’s gaze fell onto her thick padding, the look of embarrassment in Dash’s eyes grew tenfold. It didn’t particularly surprise Spitfire, certainly not as much as the diaper itself did. Again she couldn’t help but think to herself that it was cute. The general impression Spitfire had gotten of Rainbow Dash was most definitely not one of a pony who liked cuteness.

She walked around Rainbow Dash, running her eyes along the well-padded tush. “Heh, cute,” she mumbled. She caught a flick of movement, Rainbow’s ears twitching at the comment. Despite herself she grinned.

“Captain, I can explain, really,” Rainbow Dash insisted again.

Spitfire tsk’d at her. That was all it really took, for a minute.

“If you just let me-”

“Rainbow Dash,” said Spitfire, her tone soft and neutral. “When I tell you to shush, you shush. Now, you can keep going, or you can shush. I won’t tell you again.”

Rainbow’s mouth hung open for a moment as she tried to decide. She glanced back before returning to staring ahead. Her mouth closed.

Spitfire smiled. “Good girl.”

Satisfied with her inspection, Spitfire trotted back in front of Rainbow Dash. Nothing about the embarrassed expression had changed. There was fear in Dash’s eyes, and it made her feel bad for causing it. After all, Spitfire didn’t like making cadets afraid of her.

“I have to say, Rainbow Dash, that I was not expecting this,” she admitted. She gave the diapered mare a smile. “But I bet you weren’t expecting it either, were you?”

Rainbow Dash shook her head with a whimper. Her mouth remained shut, and Spitfire wondered if it was because she was embarrassed or if she was still obeying her order to be quiet. A wicked gleam came to Spitfire’s eyes as she surveyed Rainbow Dash.

I can work with this. She held back a grin. Oh yeah, I can definitely work with this.

“Cadet Dash!” she barked suddenly, watching Rainbow Dash automatically stand straight, the otherwise perfect at-attention stance ruined only by the padding pushing her back legs out. “I am very disappointed in you. Do you know why?”

Gulping loudly, Rainbow Dash held her stance with some effort. It took a lot of her willpower to do so in the face of the abrupt change in her commander’s mood. She tried to talk, but words escaped her. She knew why Spitfire was disappointed in her; she had been caught in diapers! Huge, poofy, foalish diap—

“How in Equestria could you forget to lock the door?” Spitfire shook her head. “It’s a basic concept! Unless you wanted somepony to catch you, you should…” she trailed off, narrowing her eyes. Rainbow Dash had twitched a moment ago. A tiny, meaningless little twitch. Probably.

The sudden silence alarmed Rainbow Dash as much as the direction of the conversation confused her. She peered at Spitfire worriedly. She was looking at her with a strange light in her eyes.

When Spitfire continued, her voice was low. “Unless you wanted somepony to catch you,” she repeated. A smug, knowing look slowly spread across her face. “You wanted somepony to catch you.”

Rainbow Dash began to shake her head before Spitfire had finished saying it. “No!” She nearly shrieked. “I didn’t! W-why would I want to be caught? That would be stupid! I just forgot!”

“Uh huh. Almost as stupid as leaving the door unlocked. Maybe you could have forgotten. That’s really possible. But I know about you, Rainbow Dash. You don’t really hide much, certainly not how much you love risks. What’s a bigger risk than leaving the door unlocked as you do something taboo?” Spitfire’s grin grew as Rainbow Dash’s expression became more stricken. She advanced until she was all but standing over the cringing pony.

“T-that’s not– I wouldn’t– Please don’t kick me out!” Rainbow Dash couldn't bring herself to look up from the floor. She stared down, trying to keep from seeing the no-doubt jeering expression on Spitfire’s face. “It’s weird and stupid and don’t kick me out!”

“Kick you out?” Spitfire sighed, amused and exasperated by the desperate plea. “Now, Rainbow Dash, I’m not going to kick you out just because you happen to like diapers. Big, poofy diapers. Oh no, I wouldn’t do that. That wouldn’t be any fun.”

“Fun?” Again, Rainbow Dash’s voice came out as a squeak.

Spitfire nodded. “Fun. And I’ll tell you all about it, in just a minute.” She leaned over, reaching for Dash’s diaper and giving it a poke. Whatever that poke told her apparently wasn’t pleasing.

Rainbow Dash peeked up, the disapproving frown making her cringe and whimper. Between that and the slowly growing pressure, she felt her distress rising.

Turning from the big foal, Spitfire pulled the changing mat off the bed and laid it down on the floor. Now she looked at it, the pad had a Wonderbolts theme that made Spitfire snicker. Fitting.

“Lay down, Dashie,” Spitfire ordered. She was pleased by how fast Rainbow Dash obeyed, blushing and stammering in confusion. “I need to fix your diaper. There’s a reason foals don’t do their own diapers, you know.”

As Spitfire adjusted the diaper, Rainbow Dash stared at her nervously. She felt her padding being tugged about by the older mare until it fit more snugly than before. Without thinking Dash kicked her back legs to test it, squirming. The diaper shifted with her, any looseness from its fit gone, and Rainbow Dash let an unguarded giggle out. She clapped her hooves over her mouth instantly, her blush coming back in full force.

“Aww, like having your diaper nice and snug now?” Spitfire cooed condescendingly. She chuckled at the expression of mortified delight on Rainbow’s face. “I’m glad. We can’t have you leaving puddles all over the barracks, can we?”

Spitfire left her there, turning her attention to something else. Not getting up right away, Rainbow Dash just laid there and enjoyed the feeling of a properly fitted diaper. It was so much better than when she did it herself. Not so much just the fit, but the fact somepony else had done it. She hadn’t just diapered herself now. She had, mostly, but Spitfire had fixed it. Spitfire had, in a way, diapered her. The thought made her shiver in guilty pleasure.

She finally sat up when she heard the jingle of bells. Her self-conscious delight was replaced with embarrassment again when she realised the source; her toys. Taking advantage of a commanding officer's right to ignore personal privacy, Spitfire had gone through Rainbow Dash’s bag. Right in the bottom was a mostly folded up diaper bag, decorated to match Rainbow’s diapers. It was only mostly folded up, because inside it were a few tightly packed foalish items, mostly toys.

Spitfire held up the rattle, smirking at the look on Dash’s face. She casually returned it to bag and shook the bag out to its proper size. Her smirk didn’t fade as she added the bottle of powder, the rash cream and, of course, several diapers to the bag. The last thing she needed was the mat, which she shooed Rainbow Dash off.

Rolling off obediently, Rainbow Dash had butterflies fluttering about inside her. The diaper bag was full now. The sound of the zip closing had a sense of finality to it, at least to one diapered pony. She gulped. At least Spitfire hadn’t found anything else…except Rainbow did feel disappointed, and she wondered if she had forgotten her pacifier. It should have been in there, as easy to find as anything else.

“Alright then!” Spitfire announced, breaking Rainbow Dash out of her daze. She trotted over to the door. “C’mon on sweetie, time to go.”

Rainbow Dash froze. She just went still. Spitfire cocked an eyebrow at her. After waiting for a few seconds she sighed and went to her.

“I….I can’t.” The words caught in her throat but she forced them out. “If they see me, if I go out, they’ll…”

“They’ll do what? I’m the captain around here. Nothing is going to happen. I know you’re shy, but I have paperwork to do. That means we have to go to my office,” she explained slowly and calmly, like talking to a child. When Rainbow Dash didn’t move she reached down and took her by the hoof. She tugged, and Dash stumbled along. “There we go, one step at a time.”

Her face alight, Rainbow tried to stop but Spitfire just gave her a strong pull to bring her along. Each step made her thick padding crinkle, a sound that made Spitfire grin. The big pack did claim they had ‘extra crinkle’, so it seemed Rainbow Dash was better at picking diapers than she was putting them on. She glanced at Dash for a moment, noting the mix of excitement and trepidation as they approached the door.

And just like that, the door was pulled open and they were in the hall. A plain, ordinary hall. The sort of thing that Rainbow Dash could never be afraid of. She was Rainbow ‘Danger’ Dash after all. Fearless and brave, she could walk anywhere without a hint of nerves! Unfortunately, it turned out that the same didn’t apply when she was waddling. Each step made her extra-crinkly, extra-thick diaper announce its presence while forcing her back legs further apart.

The hall was empty when they entered it. Rainbow Dash let out a sigh of relief and disappointment. The idea of somepony being out there made her already straining, pressured bladder feel even smaller and tied her innards in a knot. At the same time, it sent a tingle through her made her feel light on her hooves.

Spitfire let go of her hoof. Before Rainbow Dash could debate whether to give in to her fear and waddle back into her room or not, Spitfire’s wing extended out. She blushed as it curled around the folded wing on that side. It kept her close to Spitfire’s side and no way to fly off; just the way it was meant to keep younger pegasi from running off or trying to fly when they were somewhere near the edge of a cloud.

“Don’t worry, Dashie, you’ll get to show off your cute diaper soon,” Spitfire reassured her with a smug smirk. She enjoyed using the nickname, so different from ‘Cadet Dash’ or anything so formal. The mix of emotions it and the idea of being seen made in Rainbow Dash’s eyes was equally delightful for Spitfire. She hadn’t had this much fun in months.

Rainbow Dash whimpered, lowering her head as she was led down the hall. Her waddle forced them to go slower than she wanted, except she wasn’t sure if she wanted to go faster so she could be seen or so she could hide in Spitfire’s office. By the time they reached the end of the hall, the faint sound of somepony whistling reached Rainbow’s ears. She looked up at Spitfire, but if she heard it Spitfire gave no signs.

They turned the corner at nearly the same time as Flitter did. The other cadet stopped whistling to salute Spitfire, stepped past when she got a nod and started whistling again. Her whistling suddenly ran into a strangled sound as she stopped mid-step. A few seconds of blinking later she spun around to watch with her mouth hanging wide open. She stared at Rainbow Dash’s butt, covered by a thick, foalish garment, as the leader of the cadets was led along in a foal’s wing-hold. The bag Spitfire had was, clearly now she looked at it, a diaper bag.

“...huh?”

She hadn’t seen Flitter’s expression, but Rainbow Dash had heard her whistling die painfully and the spluttered ‘huh’ of surprise. She kept her eyes glued to the floor. Spitfire reached over and patted her on the head.

“See, that wasn’t so bad, was it?” Spitfire asked cheerfully. She couldn’t help but grin wickedly, which only grew when Rainbow Dash gave the smallest of nods. “You’re pretty meek when you’re all padded, aren’t you?”

There wasn’t much answer Rainbow Dash could give to that. She kept her gaze trained on the floor as they plodded along, a blush on her cheeks that felt like it had been stained onto her given how long she had been blushing.

Spitfire gave her mane a ruffle. “Don’t worry, it just makes you cuter. And that’s what you like about your thick diapers, isn’t it? You wanna show off how cute you can be, lil’ miss tough pony.”

The cooing, condescending tone would normally make Rainbow Dash furious. Being talked down to normally made her furious. Right now, it just made her….happy. It somehow made this all more exciting. She was just glad Spitfire didn’t seem to want an answer. The desperation to pee was fading as her anxiety abated slightly, the artificial smallness of bladder less severe than she had feared.

It wasn’t until she noticing the sunlight streaming past them that she looked up. The wall next to her was a floor to ceiling panelled window, one very familiar to her. She loved this hall. After all, it led right to the mess hall.

She nearly came to a stop, only tugged on by Spitfire’s wing. She looked in the direction they were going and her heart dropped into her stomach. The double-door of the mess hall loomed in front of them. She looked at Spitfire with wide, nervous eyes. The older mare just smiled.

“They were going to see eventually. You’re parading it around, very publicly. Showing it off, really.” Spitfire snickered. “Everypony is going to know. And I bet that just makes you excited, huh?”

Rainbow Dash opened her mouth to deny it, like she should have before, but...she just couldn’t. She closed her mouth and looked away.

“M-maybe a little…” she muttered.

Spitfire laid a hoof around Dash’s neck and nuzzled her. It was a softer, warmer gesture than she had made before. “Hey, don’t worry,” she reassured her. “Nopony’s gonna laugh. If they do, well, you have more than enough diapers to go around.”

That made Rainbow Dash laugh for a moment, which was when Spitfire pushed the door open. Her smile froze in place as she saw the ponies in the mess hall. Wonderbolts at one end, cadets at another, each group socialising within itself. Only a few glanced at the door when it opened. Those who didn’t stare did a double-take and looked again. What appeared at first to just be Rainbow Dash and Spitfire was, as the captain pulled Rainbow Dash in, turned out to be far more. There was the wing-hold, for one thing. Then, as the blushing, rainbow-maned pegasus waddled in, the diaper.

Whispers alerted the ponies who weren’t looking, or they just checked what had apparently poleaxed their friends. It only took a few seconds before they were all looking at Rainbow Dash. She stared back, mouth hanging open as she tried to think of something.

Then, inexplicably, somepony whistled.

Spitfire snorted. “Fleetfoot…”

The mare in question separated herself from the group. She looked over the pair with a twinkle in her eye. “Wow, Spitfire, talk about a surprise. What did she do, wet herself in your office? I told you not to use the angry voice, not after the last time. Didn’t they have to replace the carpet? I knew you could be harsh, but this is hardcore harsh.”

Chuckling, Spitfire dug into the diaper bag. “Uh huh. Too bad it’s not a punishment.” She rummaged around, her manner entirely casual. By now Rainbow Dash wasn’t the only one blushing, as ponies who had no idea how to react watched.

“Eh? Not a punishment?” Fleetfoot cocked her head to the side. She pulled it back when Spitfire tossed something her way, bouncing the clear bottle between her hooves until she managed to catch. “What the— what’s this?”

Spitfire rolled her eyes. “What’s it look like? Did you hit your head again?”

Fleetfoot glared at her, although it wasn’t particularly heated. “One time—”

“One time you started stalking a random stallion,” Spitfire interrupted.

“One time I get hit in the head, one time. It’s a foal bottle, yeah, but I’m not the one sauntering into the mess hall with Rainbow Dash in a diaper. Forgive me for being a bit confused.” Inspecting the bottle, Fleetfoot looked at Rainbow Dash again. “Really confused.”

“You’re always confused. Bring that to my office in, oh, half an hour. Warm milk.” Spitfire gently began to tug Rainbow Dash around to leave. The other pegasus had failed to say anything, shame making her mute as she exchanged a stare with the other cadets. She had avoided looking at the Wonderbolt officers. The pressure to pee was still manageable, and she pushed it to back of her mind. She really had more important things to think about.

Muffled giggles abruptly replaced the silence when Dash’s rear was presented to the mess hall. Spitfire looked back instantly, a venomous look freezing everypony where they stood or sat. She scanned the room with the painful glare. Cloudchaser covered her cheese snack in case it melted. Fleetfoot privately lamented that she hadn’t put milk in yet; that glare would have warmed it all on its own.

“I’m sorry, what was that?” Spitfire asked in a voice as sweet as sugar. Poisoned sugar.

Nopony said anything.

“Nothing? I could have sworn I heard somepony laugh. Am I imagining things?” she continued.

Once again, silence was deemed the best response. Spitfire gave them all a toothy smile. She didn’t have fangs, but they wouldn’t have been out of place in that smile. It was the sort of smile usually followed by a pounce, a few seconds of noise, and then dinner.

“I guess I am. Let’s hope I don’t imagine it again. Or Dashie here won’t be the only one with a waddle. Got it?” She snarled the question.

“Yes ma’am!” Every single pony chorused back at her, including Rainbow Dash. Habits can be hard to break, especially when backed up by Spitfire’s drill voice.

“Good. Come on Dashie, let’s get going. Fleetfoot, half an hour, my office.” Setting off once again, Spitfire smirked down at Rainbow Dash and the look on her face as the mess hall door shut behind them. “Something the matter?”

Dash shook her head. “No, I just...uh, thanks. That was pretty cool, you, doing that.” She rubbed the back of her neck, looking away nervously. “Thanks.”

“You already said thanks, Dashie,” Spitfire pointed out with a laugh. “I told you, nopony is going to laugh at you on my watch. Momma wouldn’t let anypony laugh at her foal. Understand?”

“Yeah, I guess. Just kinda nervous, everypony saw me in these...w-what are they gonna think? I’m supposed to be cool–” Rainbow Dash trailed off. She went over what she just heard. Her mouth was suddenly dry and she gulped as she tried to say something.

Spitfire had to grin at Rainbow Dash’s delayed speechlessness. “Something wrong?”

Shaking her head, Rainbow Dash tried to think of something to say. What did you say to that? She had no idea. She felt an odd stirring in her chest, like the nervous butterflies from before were back but not quite the same. It was a warm feeling.

“Well, if you don’t have anything to say, why don’t you suck on this?”

Rainbow Dash turned to look at Spitfire just in time to have her pacifier popped into her mouth. She blinked in surprise until Spitfire gave it a gentle push, which set her suckling. Her blush began to return, but the warm smile from Spitfire calmed her. She gave her pacifier a suckle, the redness still faintly there but not the burning blush from before. Each time she suckled on it, the blue and yellow shield bobbing slightly, as she waddled down the hall crinkling made her smile slightly.

“That’s the Rainbow Dash I know. Don’t let anypony get you down,” Spitfire chuckled, ruffling Dash’s mane affectionately.

The rest of the journey to her office passed without running into many ponies. One of the support staff, who stared for a few seconds before scampering off. Bulk Bicep saw them as well, but he just sort of froze up, brow furrowed and looking confused. They trotted on past him, Spitfire nodding at him and Rainbow Dash ducking her head with a muffled ‘H-hey dude’.

“Nice diaper!” he finally said in his usual exclamation. They both looked back to make sure he wasn’t being sarcastic. The big pegasus gave them a smile. It was innocent and bright, in general cheeriness at least.

“Uh….thanks?” Rainbow Dash forced out past the pacifier. She exchanged a look with Spitfire, more confused on her part and amused on Spitfire’s.

“You’re welcome!” With that he went on his way.

“Heh, see, I’m not the only one who thinks so.” Tugging on Rainbow Dash with her wing, Spitfire got them moving again. Her office was as the same as it had ever been, the wall decorated with a few Wonderbolts posters, a degree of hers in Weather Studies and a few cabinets. She left Rainbow Dash standing in the middle of the room while she cleared out the floor just to the side of her desk.

“There we go.” Spitfire emptied the diaper bag, setting up Rainbow Dash’s small range of toys on one side, the changing supplies on the other. She patted the spot between them. “Alright sweetie, sit down here.”

Rainbow Dash waddled on, pacifier going thuckle thuckle as she enjoyed herself. And she was enjoying herself. Away from the stunned looks and surprised stares, being called ‘sweetie’ by none other than Spitfire, Rainbow Dash felt free to indulge. She plopped down, a smile coming to her face at the ‘phfft’ of air from her snug diaper and the crinkle of the padding. Her smile became a tad embarrassed when Spitfire ruffled her mane again, but she was still smiling.

“I have grown up things to do, so you sit there and play while Momma works, okay?” Spitfire said it in a cooing, condescending tone adults used with children only just old enough to understand. “If you’re good, you’ll get a treat later.”

“Okay,” Rainbow Dash nodded.

Halfway to her chair, Spitfire stopped and looked back. “Okay, what?” she asked sternly.

Surprised, Rainbow hesitated. She looked at the older mare uncertainly. “Okay...Momma.”

Spitfire smiled at her, which made a warm feeling of approval roll through Rainbow. She beamed back. When Spitfire sat down to work, Rainbow Dash looked to her toys. She had played with them on her own, if you didn’t include Tank, but as fun as it had been this somehow felt better. She picked up the toy train, the little bell on it jingling as she began to run it across the floor. She added a little stuffed toy to it, her small smile slowly growing as she played.

The foalish ‘choo choo’ noises made Spitfire look up. She grinned at the sight of Rainbow Dash, playing with a colorful toy train. She didn’t tell herself off for thinking about how cute Rainbow Dash looked. A playing foal was basically one of the cutest things in the world, and even she didn’t mind admitting that. Especially since it was her foal.

Five minutes hadn’t passed before the door swung open without so much as a knock. This was not something most ponies did, which made sense, since most ponies weren’t this pony.

“Hey, Spitfire, I heard the wildest ta- whoa!” Soarin’ stopped halfway into the room, mouth dropping open. “Fleetfoot wasn’t lying! I thought she had hit her head again!”

Rainbow Dash snickered, looking away shyly as another Wonderbolt saw her. But not as shyly as before. The others already had. Why bother being embarrassed at another seeing, even if it was Soarin’? Summoning some of her trademark bluster and confidence, she managed to give him a tiny wave.

He waved back automatically, not bothering to hide his surprise. “Whoa,” he repeated numbly. “That is, y’know, Rainbow Dash, right? I’m not seeing things?”

Spitfire sat back, chuckling. “Depends. You seeing a cute little cadet in her cute little diapers?”

Soarin’s expression just got more surprised. “Cute. You, Spitfire, just used the word cute. Twice. Now I know I’m seein’ things, because I’m hearing them too!” A stress ball bounced off his nose, fired from Spitfire’s nimble hoof, and he grinned. “Come on Spits, that’s pretty weird for you. Saying cute.”

“Oh, shut your pie hole. So what if its weird? I’m the captain, I can be as weird as I like. If that includes finding Dashie cute when she’s all foaled up, tough luck. You’ll have to cope.” Spitfire grinned darkly. “Got something to say?”

“Heh, no way, Fleetfoot told how you got all mama bear protective in the mess hall. Found a new hobby?” As he spoke to Spitfire, Soarin’ approached Rainbow Dash. Her earlier confidence faded as he looked down at her. “So, Dash, you’re all...like, a foal now?”

The nervous filly shrugged weakly. “A bit,” she admitted. A delicate blush coloured her cheeks.

“She’s my foal now,” Spitfire clarified. “Go on Soarin’, you’re good with kids. Entertain her while I work.”

“Entertain her?” asked Soarin’. He raised an eyebrow. “How?”

She shrugged back impatiently. “I don’t know, think of something.”

“Like wh-”

“I don’t know!” Spitfire growled. “Just treat Dash like you would a foal! New rule; whenever you see her in a diaper, treat Rainbow Dash like a foal.”

“Sheesh, okay, calm down.” Soarin’ rolled his eyes and leaned down to Rainbow Dash. “So, diapers? Guessin’ you like ‘em?”

Rainbow nodded. It was a very small nod. “Yeah,” she mumbled. “Sp-...M-Momma caught me wearing them in my room.”

He sat down in front of her, giving her the grin that came so easily to him and put fanfillies at ease. “She’s annoying like that. This one time, I had this mare in my room and she just came trotting in-”

“Soarin’!” Spitfire’s snarl made them both look up. The captain glared at her friend. “When I said treat her like a foal, that did not mean tell her about what you get up to with skanks. Do it again and she won’t be the only one carrying her toilet with her.”

Soarin’ laughed nervously, nodding. He leaned down, stage-whispering out of the corner of his mouth to Dash; “I thought having a kid was supposed to mellow mares out. I guess with all the spit from you she had to add a bit more fire.”

Rainbow Dash giggled, the surprisingly foalish sound filling the room. Soarin’ grinned at her, ignoring Spitfire’s annoyed expression. The giggle made it easier for him to see Rainbow Dash as the foal she was dressed as. It was still weird, seeing Rainbow Dash wearing a foalishly patterned diaper, surrounded by toys, but it was easier to cope with.

Besides, if he so much as sounded like he was going to say something bad he had the feeling Spitfire would destroy him. He relaxed, sitting down in front of Rainbow Dash.

“So, I get the feeling a little somepony likes playing with the choo-choo train,” he said.

Spitfire watched them as she worked. Soarin’ had always been a natural with kids, and it seemed diapered mares playing at being a foal were included. A knock at the door a few minutes later distracted them, one of the cadets trotting in with a question she nervously stammered out. Her eyes kept turning to Rainbow Dash before darting back to Spitfire until she was sent on her way.

This wouldn’t have been too weird, if another cadet hadn’t come along barely two minutes later. His issue for the captain was as frivolous as the last and Spitfire sent him on his way. She had just gotten back into her work when another came along. Like the last two, this cadet looked at Rainbow Dash out of the corner of her eye.

Spitfire knew Rainbow Dash wanted to be seen, to get attention with her poofy, fluffy diaper. It didn’t make this any less annoying. She was just glad it wasn’t dampening Rainbow Dash’s mood. She was absorbed in playing with Soarin’, only stopping to give Thunderlane a somewhat more energetic wave than she had the last few ponies. The stallion had taken one look at Spitfire hard, frozen expression before gulping and waving back.

“H-hey, Rainbow Dash,” he said awkwardly.

“Hey, ‘Lane,” she replied cheerily. Her pacifier bobbed as she gave her fellow cadet a slightly embarrassed smile. “Uh, h-how’re you?”

“...good. You seem to be, ah, having fun…” He glanced down at her diaper, confused, before looking away. “Oh, I was booked in with the whirly-throwing-thingajig, I-I better get going!”

He all but fled at that point. It made Rainbow Dash snicker. “I got the power to make ponies run away!” She laughed.

Soarin’ laughed along. “Yeah, he forgot to tell Spitfire his excuse for coming here!”

Spitfire scowled. “I’m glad you two are having fun. I’m trying to work here. Somepony in this place has to actually do paperwork, and we both know you won’t.”

“Duh,” Soarin’ replied. The look Spitfire sent him made both Soarin’ and Dash laugh. “But hey, you ever need a foalsitter, I’m your guy.”

Rainbow Dash’s blush returned. She had been doing that a lot today, usually with good reason. She wondered how far this was going to go. How long was she going to spend diapered? These thoughts lurked in the back of her mind as she and Soarin’ played, distracted only thanks to Soarin’s talent for keeping little ponies — and big ponies who were little on the inside — entertained. It even kept Dashie from caring about her slowly growing urge to pee. Her bladder had been holding it for a while now, but she was having too much fun to waste time on it.

Half an hour had passed, noticeably mostly because Spitfire kept checking the clock. She was scowling at it after another ten minutes until she finally threw down her quill.

“I’m going to see what the hay is keeping Fleetfoot. I told her, half an hour! How hard is for her to keep track of time?” Spitfire stood up. “Soarin’, keep an eye on Dashie for me, I’m going to see what’s keeping Fleetfoot.”

Soarin’ nodded absently. “Sure thing Spits-”

“Spitfire.”

“-Spits, I’ll make sure she doesn’t get up to anything naughty.” He gave her a wide grin. “You can trust me!”

Spitfire gave him an unconvinced look. “Dashie, make sure Uncle Soarin’ doesn’t do anything stupid.”

“Yes, Momma!” Rainbow giggled at the put-out look on Soarin’s face.

“Aww, come on Spitfire, that’s not- wait, ‘uncle’?” He looked at Spitfire in surprise.

She just grinned and sauntered out.

“That mare,” Soarin’ said, shaking his head. “Sometimes, I think she says stuff just to...you okay there, Dashie? Something wrong?”

Rainbow Dash uncrossed her back legs and shook her head, blushing brightly. “N-no, I’m fine.”

He gave her a suspicious look, but nodded. “If you say so...you can call me that, if you want,” he added.

She paused halfway to reaching for her train again. “C-call you…”

“What Spitfire said. ‘Uncle Soarin’. If you want to, but hey, you’re calling the captain ‘momma’. No need to be shy now,” he assured her with a chuckle. “You’re not really the shy type, even with a diaper.”

“Yeah, I guess you’re right...U-Uncle Soarin’.” She looked away again, until he gently pulled her face back to him.

“Good girl. Heh, this is pretty fun.” Soarin’ began to get Dash back into playing when a knock at the door disturbed him. He looked up. “Huh? Oh, Lightning Dust, you need something? Spitfire isn’t here.”

Rainbow Dash’s rival and currently the only cadet on probation, Lightning Dust peered through the door with a curiously blank stare. “Uh, yeah, I know. She sent me to get you. Something about Fleetfoot and getting hit on the head?”

Soarin’ groaned. “Oh Celestia, not again. It’s like her skull is a magnetic. I’ll be back in a minute, Dashie, you play until I get back.” He ruffled her mane and stood up, galloping from the room.

Rainbow Dash stared at the doorway. Lightning Dust seemed to fill it, now Soarin’ was gone. She was hyper-aware that it was just the two of them now. Even worse, her bladder was beginning to speak up again. It made her groan slightly. It did not make Lightning Dust go away, much as Rainbow hoped she would.

Instead, Lightning Dust did the opposite by stepping inside. She didn’t say anything. Lightning Dust just stared at her, nothing on her face. Dash diverted her gaze, fighting her blush. She really hoped this didn’t end badly…

Without warning, Lightning Dust burst into laughter. She trembled from the force of her own mirth. Rainbow Dash looked back and her ears went flat when she saw Lightning Dust’s eyes fixed on her. The mare was looking right at her and laughing so hard there were tears in her eyes.

“L-look at you!” howled Lightning Dust. She had to grab onto the door frame to keep herself up. “A-a d-diaper! Too good! T-too good!”

Squirming in place, Rainbow Dash whined. “Shut up!”

Her rival made no move to do so. She kept laughing, pointing one forehoof at her while the other held onto the frame.

Rainbow Dash rose onto her hooves, her temper flaring. “I said shut up!” Her pacifier fell out of her mouth, bouncing on the floor between them. This just seemed to set Lightning off again. This time it was anger that made blood rush to Dash’s face. “Shut the hay up!”

Taking some control, Lightning Dust lowered her explosive laughter into barely restrained giggling. She didn’t bother doing more than that.

“O-oh, so threatening,” she snickered. “Whatcha gonna do, ‘Dashie’? Throw a tantrum?”

The mocking tone set Rainbow Dash’s teeth grinding. She could accept being talked down to by Spitfire and Soarin’. They were, in an odd way, nice about it. They were indulging her. Lightning Dust was being a bitch. She was practically growling.

“I guess I’ll be lead pony again soon,” Lightning Dust went on, her voice as mocking as it had ever been. “After all, what sort of leader could you be? Wearing a diaper? We’d have to make pit stops every half an hour just so Spitfire could change you.”

Rainbow Dash narrowed her eyes, humiliation and anger making her tremble now. “Shut up,” she hissed.

“I bet Spitfire is just doing this for kicks, ending with kicking you out for being such a weirdo,” Lightning Dust taunted. She began to laugh again, which was why she didn’t notice Rainbow Dash jumping at her. Dust yelped, jumping back just in time.

Rainbow Dash’s face smacked into the door frame. Pain shot through her muzzle, centred on her nose, and she landed on her puffy rear. That sinister pressure inside her finally gave out in her surprise and pain. Sprawled out on her diaper, one hoof going up to her muzzle and feeling the dribble of blood from her nostrils, Rainbow Dash didn’t realise she was filling her diaper until she saw Lightning Dust point. The once-smiling clouds on the front of her diaper were turning into frowny-face rainclouds as a yellow tint spread across the front of her diaper.

Sitting there in front of Lightning Dust, wetting her diaper, Rainbow Dash couldn’t do a thing to stop the other mare from watching the tell-tale signs of a soaked diaper. Laughter as hard as before, harder even, came back in full force.

“What a foal! You’re actually using it! W-what is wrong with you?” Laughed Lightning uproariously. “You’re s-such a freak!”

Freak. Her nose hurt, somepony was laughing at her, and she was a freak. A diaper-wetting freak….A freak…

Maybe it was the feelings from playing the foal for the past while. Maybe it was the pain and the humiliation of being laughed at. Maybe, just maybe, it was Lightning Dust stomping on a big, painful sore spot. Whatever the reason, Rainbow Dash couldn’t stop the tears that began to spill down her cheeks. She bowed her head, sobbing and covering her head in with her hooves as if it could hide her shame.

S-she’s right...I’m a freak. Freak.

Lightning Dust dimly noticed Rainbow Dash crying, and nearly stopped laughing in sheer surprise. Rainbow Dash, crying? Nah, not possible. It’s not like she could actually make Rainbow Dash of all ponies cry….right?

She wouldn’t get to ponder that question. A gust of wind cut off Lightning Dust’s laughter, knocking her to the floor. She rubbed her chin, grumbling in pain and confusion. Her attempt to stand up was stopped by something in front of her. Or rather, somepony.

Spitfire looked down on Lightning Dust with a look on her face that had left behind fury and reached the sort of emotion normally reserved for insane dark magic-users. She glared down at the fallen cadet.

“What have you done to my Dashie?” Spitfire snarled, voice so low and threatening it made Lightning’s bones quake in terror. A tremor of fear ran down Lightning Dust’s spine. She gulped and tried to stammer an answer. Spitfire’s hoof slammed in the floor next to her, silencing her. “Be. Quiet.”

Lightning Dust whimpered in stunned response. She couldn’t really think of anything else to do. She had the curious sense of lightness but frankly Dust was too busy being terrified to think about it.

Spitfire was on Rainbow Dash instantly. She wrapped her big foal in her wings, drawing her close. “Shhh, it’s okay, calm down, Momma’s here,” she cooed, running a hoof down Rainbow’s back.

The diapered mare struggled half-heartedly, whimpering and cringing as her nose was gently touched. “L-lemme go,” she whined.

“Why would Momma do that? I need to make sure my special little foal is okay. Did you hurt your nose?” Spitfire’s voice was softer than it had been before, as kind and warm as it had ever been in her life. “Shh, let Momma make it all better.”

“N-not special,” Rainbow didn’t bother trying to hide her distress, just flailing about until Spitfire tightened her wings. “J-just a freak! ‘m just a weird, stupid freak!”

Spitfire didn’t bother asking who had said that to Rainbow. She promised herself she would visit revenge on Lightning Dust in due time. Rainbow Dash came first. She looped a hoof around Dash’s neck, hugging her and rubbing her back. The rainbow-maned pegasus was practically in her lap now, and there wasn’t enough difference in their size to make it easy. Cradling Dash with her wings helped keep her in place.

“Dashie, sweetie, you are not a freak.” She forced Rainbow Dash to look her in the eye and repeated it. “You are not a freak. You are my special little filly. I don’t care what anypony says, and neither should you. You don’t need an excuse to look adorable in your big poofy diapers, to relax in Momma’s office with your toys. At least, not to me. And who I am?”

Rainbow Dash looked up into Spitfire’s eyes, sniffling, as her tears were wiped away by an orange hoof. “Y-you’re….” she bit her lip nervoulsy. “You’re Momma. M-my Momma.”

Spitfire rewarded her with a warm, loving smile, tickling her tummy gently. “Yes I am. I’m your Momma, which means I can show you off in your adorable diapers, I can kiss your boo-boos better, I can do whatever I want. And that includes telling you you’re not a freak, and if I ever hear you call yourself that again I’ll leave your flank red and sore, got it?”

That got a weak giggle and a nod from Rainbow Dash.She leaned in, resting her head on Spitfire’s shoulder. “Yes Momma.”

“Good girl.” Spitfire hugged her tightly, closing her eyes. They snapped open a moment later. “Cadet Dust, not another step.”

Lightning Dust had not, in all fairness, been stepping. She had been crawling away. She froze. This was made easier with Soarin’ running towards them down the hall, something tucked under his wing.

“Spits, what’s...whoa.” He slid to a halt, stopping in front of Lightning Dust. His eyes slowly went from Rainbow Dash’s bloody nose and Spitfire hugging her, down to Lightning Dust. Eventually he saw something that made him smirk. “Heh. I think I can guess what happened. Fleetfoot warned you, Spitfire. We’re gonna need a new carpet.”

Lightning Dust didn’t realise what he meant until she heard Rainbow Dash giggle, followed by a snicker from Spitfire. She looked back at the same thing they were all staring at now. A damp stain was spread across the floor where Lightning Dust had fallen. The feeling of lightness suddenly made sense. Lightning Dust whimpered in shame.

Spitfire smirked, chuckling. “Soarin’, pass me that bottle.” She caught it when he threw it from under her wing, and then caught his eyes. “Next time I leave you to look after Dashie, don’t let some cadet’s fib send you running pointlessly after me, got it?”

He nodded contritely. “Yes ma’am.”

“Good.” Spitfire adjusted Rainbow Dash, pressing the bottle to her foal’s mouth. “Don’t let Lightning Dust go. Once feeding time is over, I think my little Rainbow needs a change. How’s that sound sweetie? A nice clean diaper, just for you,” she murmured, rubbing one hoof in circles on Dash’s belly.

The big foal mr’d in agreement around her bottle, suckling thirstily as she snuggled into place with a small smile.

“And after that,” Spitfire went on, her expression turning sinister as she looked at Lightning Dust. “Somepony else is going to need a diaper of her own. And I have a feeling she’s going to need it for a long, long time.”