"Thank you Fillydelphia!" Spitfire cried into her microphone as the crowd roared with approval. "You've been an awesome crowd! Goodnight everypony!"

"Best! Show! EVER!" Rainbow Dash cheered as the Wonderbolts took their final bows. Indeed tonight's show had been spectacular. The expert flyers had not only dazzled their fans with their usual routine but unveiled several new tricks that left the entire crowd stunned into silence.

While the rest of the crowd started filing out of the stadium, Rainbow leaned back in her seat and sighed. As great as the show was, Rainbow still wished Fluttershy, (or any of her friends) could have been there with her. Unfortunately, all of them had things to take care of and couldn't make it.

"Excuse me miss." Rainbow snapped back to reality when a custodian gently tapped her shoulder. "If you're finished with those I need to toss them out." He smiled and pointed at the pile of empty food trays under her seat.

"Huh? O-Oh, sorry about that." The pegasus blushed, scratching the back of her head.

The colt chuckled and waved his hoof dismissively. "Don't worry about it ma'am. You have yourself a nice evening."

"Thanks, you too." With that, Dash carefully hovered over him and headed for the exit. By now most of the crowd had departed so she could take her time and look around. "Probably too late for an autograph. Oh, well guess I'll just-"

"Hey Dash!" a voice called out from above, "Rainbow Dash, is that you?!"

Rainbow Dash's eyes went as wide as dinner plates when looked up to see who it was. "S-S-Spitfire!?!"

The Wonderbolt chuckled as she touched down next to her, pulling the hood of her flight suit down. "I thought it was you. How've ya been?"

"Umm, I-I well..." Rainbow swallowed the lump in her throat and composed herself. "I'm good. Great show by the way! I was on the edge of my seat!"

Spitfire smiled modestly at the praise. "Thanks. I almost messed up the last trick but I don't think anypony noticed. Anyway, wanna hang out? I wanna make up for what happened at the Gala."

Rainbow let out another squeal but her smile melted away as she remembered something. "Well, I'd love to...but I really need to get going if I'm going to make it home before dawn." She moaned a little, as if her words caused her physical pain. "M-Maybe next time."

"Wait a minute, you didn't get a hotel room?" Spitfire asked, raising an eyebrow, "Dash, you can't be serious, Ponyville's halfway across Equestria, you'll be flying all night."

"Well, y-yeah..." Rainbow began nervously, "but I left early this morning and made it here like twenty minutes before the show. If I leave now I'll get like..." She tapped her hoof, trying to count it out. "An hour and a half of sleep before-"

Spitfire held up her hoof to cut her off. "Look, why don't you just crash with me tonight?"

It took a few moments for Rainbow to process what she just said. "W-What? I-I mean...I couldn't."

"Why not?" The yellow mare shrugged. "Our manager got all of us suites at the Hoofton. It's nice but it's a little big for just me. Besides, Soarin’ and the gang like to stay out all night after a show, I could use the company."

"Wow...I-I don't know what to say. Thank you!"

"No prob. Like I said, I owe you after kinda ditching you at the Gala." Spitfire spread her wings and lifted off, hovering in place. "Come on, I'll race you to the hotel!" With that she took off flying, Rainbow following close behind her.
___________________

When they arrived at the hotel, it took all of Rainbow's self control not to freak out at how amazing the place was. With the exception of maybe Canterlot Castle, the Hoofton hotel was the considered one of the ritziest places in Equestria. While Rainbow wasn't normally the biggest fan of fancy stuff, even she had to admit the place had it's charm.

"Here we are," Spitfire announced as they arrived. She unlocked the door and held it open for Dash. "After you."

"Whoa!" Rainbow cried as stepped inside.

The suite was more or less a small apartment. The main living room had a massive couch and two lounge chairs arranged around a wooden coffee table. Past that was a small kitchenette, complete with a fridge and a simple stove. To the left was the bathroom. The door was open, so Dash could see the huge jacuzzi tub inside along with a walk-in shower.

"Why don't you go grab some snacks?" Spitfire suggested as she stepped into the bedroom, giving Rainbow a glimpse of the large, King-sized bed within, "I'm just gonna slip outta my flight suit. Be back in a flash."

"No rush," Rainbow replied before heading to the kitchen and poking around, finding it fully stocked with food. Unfortunately, it was mostly health food. "Blech! Rice cakes and bran muffins? How can anypony eat this cardboard stuff?"

A little annoyed at this point, Rainbow kicked the cabinet closed and flew over to the bedroom.

"Hey, think we could order a pizza or something?" She asked, pushing the door open. , "All we got in there...is..." Rainbow trailed off, suddenly finding herself at a loss for words. Spitfire was standing at the foot of the bed, her flight suit laid out on the mattress...and holding a large package of disposable diapers in her hooves.

Spitfire herself, meanwhile, was frozen in place, blushing heavily as Rainbow stared at her. "Th-This isn't what it looks like!"

"Really?" Rainbow asked flatly, raising an eyebrow. "Cause it looks like you're trying to hide a pack of diapers under the bed."

"...okay it's exactly what it looks like. But I can explain!" Her breathing began to pick up as she dropped the package. "S-Sometimes when you're flying, like when you're going real fast and making sharp turns it can make you pee a little. S-So sometimes I wear a diaper under my uniform so I don't mess it up." She gave Rainbow a big smile as she finished but the other pegasus just started at her, her face completely deadpanned. With a sigh, she lowered her wings again. "No good?"

"Sorry." Rainbow replied, stepping further into the room. "I've never had that problem before. Besides, there's no way your flight suit could hide one of those things."

"Right." Spitfire sighed, lowering her head in defeat. "Okay look, this is gonna sound kinda weird...and maybe a little sick but-"

"Wow, I didn't know they made them this big." Rainbow said suddenly as she slid the package closer to her. As she looked it over, a smile slowly crawled onto her face. "Do...do you think I can try one on?"

Spitfire looked at her in confusion. "W-Wait a minute! Are you saying that you...like diapers?"

Rainbow blushed a little bit but kept her smile. "Well...kinda. See, a while ago..." She paused searching for the right words. "A...a good friend of mine got me to wear one to bed. I'd had kind of a rough day and she said it'll help me relax. It was a little weird at first but, once I got used to it, it felt incredible. I even peed a little bit and that made it feel even better Since then, I couldn't stop thinking about it. I wanted to try it again, but the only diapers I could find were too small for me." She sighed, glancing down at the package. "But these look perfect."

When Spitfire finally recovered she broke out into a big smile. She'd met a few like-minded ponies before, but Rainbow Dash was the last pony she had expected to be into diapers. And as a bonus she was a newbie, she probably hasn't even tried messing herself yet. When she invited Dash to stay with her she had expected to be up all night talking and joking around. Now, however, things were shaping up to be much more interesting.

"Well then," She began, getting Rainbow's attention again, "how about we get started? I'll show you just how much fun wearing diapers can be." With a smirk she slid the package over and pulled out a pair of diapers. "You first. Be a good little foal and lie down for momma."

Rainbow chuckled at the teasing, blushing even more. "O-Okay. I guess it-oooh!" She groaned suddenly as her stomach started gurgling loudly. "A-Actually, I need a minute first. I think that Everfree Chili from the stadium is making a comeback. I'll just hurry and-"

"Oh no you don't!" Spitfire said with a chuckle as she zipped around Dash and kicked the door closed. "If you're going to use the potty first then what's the point of wearing a diaper?" Before Dash could answer Spitfire nuzzled her cheek and gave her a comforting smile. "Trust me on this one Dash, I promise you won't regret it."

"I...I don't..." Dash trailed off as another cramp hit her. Moaning softly she looked up at the Wonderbolt. "I-I guess if you say it's okay. Just...just hurry okay. I don't think I can hold it much longer."

Spitfire nodded and grabbed the first diaper, quickly unfolding it as Rainbow lowered herself to the floor. Working fast, the orange-maned pegasus wrapped the foalish garment around Rainbow's flank and secured the tapes so it was nice and snug. After checking the leg and tail holes for potential leaks she gave her cyan-colored friend a pat on her butt.

"That should do it." She chuckled as Dash stood up again. "How's it feel?"

"Good...I guess," Rainbow replied softly, "I-I mean, it feels nice and all...I-I just..."

Spitfire nodded in understanding as she slipped her own diaper between her legs, quickly pulling the tapes into place. "Look, just let it all out. Don't worry, these diapers can hold a lot."

Rainbow whined again, fidgeting around as she fought against herself. "B-But...But I..."

"It's okay," Spitfire said, almost whispering as she moved next to Dash and nuzzled her again, "All you have to do is..." With a smile she leaned in and pressed her lips against Dash's, kissing her deeply.

"MMRF!!" Rainbow yelped in surprise, her mane standing up on end. Once she recovered from the initial shock she closed her eyes and kissed her right back.

As their tongues danced with each other Rainbow let out a soft moan as she began to fill her diaper with thick, warm muck. Something in the back of her mind told her she should feel ashamed and disgusted with herself, but as the warmth spread across her flank all she felt was bliss.

Spitfire finally broke from the kiss and smiled as Rainbow opened her eyes again. "There, feel better?"

"Y-Yeah." Dash replied. She was blushing heavily but smiling as well. She wiggled her bottom a little, feeling the mess squish around inside her diaper. "I-I can't believe I did that."

"Well, you did," Spitfire said with a chuckle as she walked past Rainbow to get a look at her sagging diaper. "How's it feel? How's it feel to poop in a diaper like a little filly again?" She giggled and playfully held her hoof to her nose. "Feels great doesn't it?" Dash, her entire face bright red at this point, gave her a little nod but said nothing. Spitfire, however, just smirked as she leaned in close to whisper in her ear. "Well, I know how to make it feel even better. Wanna give it a try?"

Rainbow shivered a little as Spitfire's breath hit the back of her neck. Trembling a little, she glanced back at her idol and tried to speak. "O-okay...W-What do I have to do?"

The Wonderbolt chuckled and gave Dash's diaper a pat, sending another shiver up her spine. "Just lay down and lift up your flank. I'll do the rest."

With a nod, Rainbow couched down, laying her head on the soft carpet while keeping her bottom as high as she could.

Spitfire smirked as Rainbow got into position. Lifting her hooves she gave Rainbow's diaper a little squeeze, making the blue pegasus squirm a bit, before rearing up and mounting her. Dash let out a cry of shock as she did so, but a quiet shush from Spitfire was all it took to calm her down again.

Licking her lips, Spitfire slowly began to thrust her hips forward, pressing their diapers together. Rainbow gasped, a thin line of drool dripping down her lip as she felt her mess get smushed around her flank.

"There we go!" Spitfire chuckled, giving her another thrust, slowly picking up the pace. "How's that feel Rainbow Dash? You like having your poopy diaper mashed around like this? Or maybe you just like having me on top of you, right?"

Rainbow moaned, her tongue hanging out of her mouth at this point as Spitfire humped her. With every thrust she could hear her mess squish around in her diaper, the soft muck soon seeping into the front as well. By all rights this should be horrible. Between the messy diaper, Spitfire's taunting and-wait, what’s that noise? Was...was she peeing?

"Ahhhhh..." Spitfire sighed as she relieved herself, the sound of her pee soaking into her padding quite obvious. When she had finished she pushed forward again, both diapers squishing as she did so. "Oh yeah! That's so much better. Don't you agree Dash?"

Rainbow struggled with her answer. She had always thought she was weird for liking diapers. It was something she thought she should hide from everypony, especially her friends, lest they think she was a freak. Now here she was, wearing a diaper made for grown mares, one she had filled with her own poop, while the captain of the Wonderbolts had her way with her. She should feel humiliated, this should be a nightmare, but...it felt sooooo good.

"Y-Yes!" she finally cried, shaking her hips along with Spitfire's thrusts, "I-I love it! I love it so much!"

Spitfire grinned and paused, wiping some sweat from her brow. "Oh you want more do you?"

Rainbow nodded frantically, panting for air. "Yes! P-Please don't stop! I...I think I'm gonna...I-I can feel it! Just please don't stop!"

"Haha! Whatever you say!" Spitfire laughed as she wrapped her forelegs around Rainbow's middle and started up again. This time she moved much faster, flapping her wings to increase her speed as much as possible.

*Squish-squish-squish-squish*

Spitfire's breathing had begun to pick up as she listened to their diapers rubbing against each other. She had been so preoccupied with Rainbow, she barely noticed her own orgasm creeping up on her. A light blush appearing on her face, she bit down on her lip as her eyes rolled back into her head. "R-Rainbow...I-I'm almost there....l-let's come together!"

"O-Okay..." Rainbow replied, barely able to think straight she was so overwhelmed with pleasure. "Oooh....Oh Celestia I-"

"AHHHHHHHH!"

The two mares cried out in tandem as they came, both of them spraying more fluids into their diapers before collapsing in a heap. After a seconds their breathing returned to normal but neither wanted to move as they basked in the afterglow. Finally, Spitfire lifted her head and swept her mane back.

"Whew..." She sighed, giving Rainbow a pat on the back. "You were great Dash. Sorry if I got a little rough with you but you gotta admit it was worth it." She chuckled softly but frowned when she didn't receive an answer. "Dash? Dash are you okay? Come on, say some-"

"Zzzzzz..."

Spitfire's eyes went wide as Dash began snoring and she had to stop herself from busting up laughing. "Aww, poor thing, guess I wore you out, huh? Oh well." She yawned and laid down beside her, wrapping a hoof around her rainbow maned companion as she snuggled up with her. "G'night Dash. Thanks for the fun."

"Mff...y'er welcm..." Dash mumbled drowsily, sticking her hoof in her mouth like a foal.

Spitfire smiled and gave Dash a little kiss on the cheek. "Tomorrow, I'll let you be the top."

The End