Short On Breath

by The Burrow

Rating: mature
Tags: Fetish, Rainbow Dash, Fluttershy, Sex, My Little Pony: Friendship is Magic, Anthro, Porn
Length: 3534

Shorter than average and built thicker than a bowl of oatmeal, Rainbow Dash has trouble when she exercises. A chance encounter with Fluttershy helps alleviate the problem.

Shorter than average and built thicker than a bowl of oatmeal, Rainbow Dash has trouble when she exercises. A chance encounter with Fluttershy helps alleviate the problem.

A quick smut fic that realy just got stuck in my brain. I gotta write these more often.

Spoilers for shortstack Dash, tall and curvy Fluttershy, and a massage turned lewd

If you enjoy this, please consider getting a commission from me!

Fully cover art number is 3387349.

Published 2024-08-18 22:50:00 UTC
Last updated 2024-08-18 22:50:00 UTC

The Ponyville Gym

Each bounce off the treadmill made Dash wince. No matter how many she tried, or how much support they advertised, they were never enough to keep her tits from bouncing hard off her ribcage.

She believed in a holistic approach to exercise. It wasn't just about getting her wings strong, relying on natural talent so she could fly fast. She also wanted to make sure that every inch of her was toned and ready for just about anything life could throw at her.

Racing Applejack? Check. Drop-kicking baddies? Absolutely.

Looking damn fine in anything tight and form-fitting? You can bet your ass that was intended.

The problem is as she matured into adulthood, her body had rebelled against her. Where she'd been rather svelte, a slim young filly with a runner's body, she was destined to inherit what her mother gave her.

She'd stopped growing any taller at around sixteen, falling shy of five feet tall. At twenty, she started getting wider.

She hated being called a shortstack, at least outwardly. She knew she had a complex about the term, especially as applied to her.

Yet privately she admitted that's exactly what she was.

Rainbow Dash was absolutely a shortstack in the hottest sense of the word.

Looking down, trying to focus on hooves too far under her cleavage to even hope to see, her massive knockers bounced in her vision. She'd given up trying to get a proper bra fitted to her, which was probably part of the reason why she had so much trouble now, but why the fuck bother when she was probably going to have to swap them out in a few months? She'd shown no signs of stopping her mature growth spurt.

With a faint growl, Dash crossed her arms over her chest. She turned her palms toward her, cupping her tits to try and reduce the wobble as much as she could.

Unfortunately, as Applejack put it, she had two bushels more than she could hold.

It helped a little. It stopped her tits from clapping together, though it made her look like a grumpy delivery mare hugging her goods close to her chest.

A different set of applause broke out behind her. Not from anypony watching her, of course. Everyone knew that if Dash caught them staring at her booty or breasts they'd get an earful and the threat of a black eye.

The problem was her booty, though at least that didn't hurt. It was just a little embarrassing to have her ass announcing her jog for everyone to hear.

She owned it as much as she could. She almost always wore sports bras and gym shorts, though she always made sure to head home and change into a clean set once she was done. It compressed her shapely body down just a little, though she didn't need much help in that department.

The treadmill beeped, indicating the end of the run she'd programmed in, and then it started to slow down.

Dash looked behind her, and a handful of heads all turned back to their own machines. She hadn't made eye contact with anyone, so everyone was safe for now.

She wanted to see the mirror at the far end. The full wall thing that ponies admired themselves in before. With her steps producing less motion and thus less bouncing, it allowed Dash to finally release her bosom and reach for one of the treadmill's handles to steady herself.

Of course her shoulder boulders lost their extra support, and her back and shoulders started to whine in her head. Moreso than usual. Celestia she needed to do something about that again soon.

She found herself in the mirror and beamed. Her fat, toned ass bounced with each step, just enough jiggle to be pleasing without being out of shape. One could bounce a bit off it and catch it.

It also liked to eat shorts, which was a mixed blessing. On the one hand, she could absolutely understand why everypony behind her wanted to stare.

The treadmill stopped, and she half-hopped on her hooves.

Her cheeks slapped off one another and her thighs. Which was the other problem. Sometimes that clap was hot. Sometimes...

Sometimes it embarrassed her.

Unfolding her other arm she reached behind herself, her fingers slipping under her shorts and tugging them out of her crack. They still didn't achieve full coverage, slipping back between her cheeks at the lowest point, while it angled up around her hips.

That was the sweet spot. Too bad she had to go shower.

Dash put a hand on the small of her back and groaned.

She was still a little soggy after the shower, her multi-coloured mane tied up behind her so it didn't stick too much to her shoulders and back. She'd let it air dry, worry about washing and drying it properly later on. She'd slipped her shorts back on but left the bra hanging over just the one shoulder, using a towel to keep her bust covered instead.

It only mostly covered her lengthways, so she had a substantial breeze fluttering up from beneath. She might flash a few folks before she got dressed if there was anyone else there, but she'd take the relief of cooling air pulling water from her coat and skin.

Leaning forward on the lockers, Dash tried to arch herself backward, in search of an elusive pop. It took some effort, bending more than she was comfortable with in the end, but she found the right angle eventually.

Pop. Sigh.

It helped, but only a little, and she curled her hands up into fists as she straightened back out. She groaned, then pressed her forehead to the metal.

"Dash? Are you okay?"

The soft voice caught Rainbow Dash's attention, her ears and head perking up before turning to the source.

Right. Fluttershy had yoga around the same time. Dash just usually happened to finish up before Fluttershy did.

She loomed over by the entrance, the door swinging gently shut behind her.

Or, well. Maybe looming was relative. Fluttershy was just a helluva lot taller than Dash, like she stole all the inches she was supposed to get, and all the others Dash did.

She dressed more modestly. A loose, white shirt clung to her chest, though even the exertion of yoga had covered her in enough sweat that it turned faintly transparent, exposing the pink colour of her bra underneath. Below that a loose pair of yoga pants that hung loose around her ankles yet tight around her hips.

Perfectly demure and perfectly sexy, like Fluttershy didn't know what she looked like to everyone else.

"Yeah," Dash grunted. She pushed herself away from the wall, putting her hands on her hips in a power pose. She even unfurled her wings as she smiled, doing her best to ignore the pain spiking up from the lower curve. "Never better."

Fluttershy's bright blue eyes stared at her, a small, permanent frown on her face, then tilted her head to one side. "Um, alright, but you don't really look okay..."

"Pssh. I'm fi-eeene!" Dash pulled something when she tried to wave dismissively, and both hands flew to her back again. "I'm. Fine."

"Dash..." With a sigh, Fluttershy rolled her shoulders back and crossed the locker room. "Sit down, please."

Dash hated it when Fluttershy used her mom voice. A firm disappointed tone that still sounded sad and soft, but the other mare would be stubborn if Dash didn't do as she was told.

Shuffling back to the bench in the middle of the locker room. Dash sat down, her ass slapping the wood. She tried straightening up again, rolling herself backward, and without needing to worry about balancing herself she found it a little easier.

Fluttershy sat down next to her, half-turned with a leg curled up on the seat. "Can you tell me what happened? Did you push yourself too hard?" She put a hand on Dash's thigh and gently squeezed. Under other circumstances, Dash'd be pissed someone touched her without asking, but Fluttershy was on the short list of exceptions.

Rainbow Dash crossed her arms and pouted. "It's stupid," she said, staring at the tiles on the floor.

"It's not stupid," Fluttershy reassured her. "What is it?"

Sigh. Siiiiigh. "It's... my back. It's hurting a whole fucking bunch again." She jerked a thumb over her shoulder before wrapping her arms up underneath her breasts, lifting them with her forearms. Not everything remained supported though, as some of their mighty mass spilled over the front of her forearms. "These fucking things are driving me mad, I swear."

Fluttershy's hand squeezed. "That's not surprising." She hummed, putting a finger of her other hand to her lips. "I mean... have you ever considered... you know..."

Both of Fluttershy's hands came close, and she mimed holding a ball. Then the imaginary ball shrunk in her hands.

Dash blinked. "Oh heck no. These things are—" She was about to say they were wonderful. She loved her boobs. Everyone loved her boobs. "—I-I am not letting these things win! And isn't that a little drastic!?"

With a sigh that made her bosom heave, Fluttershy nodded. She dropped her hands to her lap, as did her eyes. "It was just a suggestion, Dash. But if they're hurting you then that's kind of a permanent problem. It's something to think about."

Dash huffed, tucking her arms up even more. Her breasts ached as she squeezed them tight, and she felt something try to squeak out of her throat.

"There is something we could try right now?" Fluttershy struggled to find Dash's eyes, or even look at her at all, all while nibbling at the inside edge of the lip. Her hands closed together, wringing themselves between her thigh thighs.

Dash rubbed hers together. She wasn't sure why. "Okay. What?"

"Oh, well..." Fluttershy gave as forceful a cough as she could give. "Did you know the spa offers training courses? Nothing like, super comprehensive or anything, but a nice starter sequence anyone can do."

That made Dash snort. "I'm not sure it's going to really help," Dash said.

"I mean you should probably go see a specialist or the twins or something anyway, but until you do I figured maybe trying it out on you to see if it works might be a good idea." Fluttershy shrugged. "And maybe it'll make things a little less painful until then."

Dash wanted to reject it. Anything other than fitting a new bra felt like admitting defeat. She'd normally power through it, normally put up with the muscle spasms and creaking spine.

Fluttershy made a reasonable argument, though. Plus she'd seen a few other mares giving each other some good lovin' from behind, making sure all the post-workout knots were eased out. It wasn't some strange new idea.

"I guess we can try it," Dash said.

Fluttershy stood up, her fingers continuing to dance around one another. "You'll need to lay down, and um. Take the towel off. If that's okay." Fluttershy glanced over her shoulder at the door. Not a peep since she came in, but it was a matter of time before someone did.

Peeling the towel off, Dash lay down on her front as she was asked and immediately ran into a problem.

Even laying as flat as a plank, her head and shoulders were raised a few inches off the bench. Her bosom squished up under her, bulging out to the sides and top. All the pressure of her torso atop her tits made their aching worse.

She endured. Again, she couldn't let them win, so she just did her best to relax, letting her arms hang off the sides of the bench.

"Okay," Dash creaked. "I'm ready. I think."

Uncertain hooves scraped across the floor behind Dash, and then two sets of hands gently touched her shoulders. Dash jumped a little, tensing up again, and the twinge near the base of her spine flared up once more.

"So, I'm just going to, uh... see what I remember." Fluttershy curled up her hands, not quite into fists, so she could get the balls of her palms against Dash's body.

To Dash, it felt like being groped by the shyest mare she knew. Which, yeah, she was being groped by the shyest mare she knew. Just weird little touches that made her tingle more from the contact being a little strange and jerky more than anything.

Dash didn't question it for the moment. She just let Fluttershy do as she pleased and tried her best to understand what it was she was doing.

Eventually, a pattern formed. Fluttershy's fingers poked Dash here and there, right where certain bones and tendons met. Outlining the shoulder blades, or tracing the muscles that let the wings work as they did. Those touches made them spasm, and the right wing jerked out to the side in front of Fluttershy.

She squeaked in surprise, and Dash chuckled. "Careful."

Fluttershy hummed, then resumed her work studying Dash's anatomy. To her ribs, where she pressed in from the sides until the last set. Dash jerked again, sucking in her tummy with a gasp while the muscles across her back clenched again. There the muscles across her chest helped make her boobs feel like a giant had squeezed them even tighter after being bound to the bench by gravity.

She glared over her shoulder at Fluttershy, though she seemed none the wiser as she trailed inward, finding the top of Dash's buttocks.

She didn't go any further, which at least confirmed that Fluttershy wasn't just going to use the opportunity to cop a feel. Her friend didn't seem the type to try that, anyway. Either that or she chickened out.

Beyond the poking, nothing much seemed to happen. Right as it started to tick Dash off, the patience for her friend wearing in, Fluttershy grabbed her by the waist and pressed her palms in.

Her spine cracked. Celestia, it felt good, and a tingle radiated out from there. A part of her brain was absolutely certain that was not something Fluttershy had been taught to do but the other part didn't care because for a few precious moments, her back stopped hurting entirely.

"Oh! Er, are you okay?" Fluttershy pulled her hands away, her shadow looming over Dash as she took a step forward.

"More," Dash muttered.

For a moment, nothing happened. After another moment, Fluttershy finally mustered up the courage to continue, and her hands landed back down.

The next motions weren't quite as extravagant or dramatic. It seemed Fluttershy remembered what she was meant to do, kneading her way up Dash's back from the spine. She worked in a combination of little zig-zags and coiling motions that worked along the waist, then around the base of the wings.

The spasming tingling came back, and the wings jittered at the base while the rest of them unfurled, falling fully off the bench like lump curtains. They must have got in the way as Fluttershy's hands came off Dash for a moment before finding purchase a little further up.

Bliss washed over Dash. Goosebumps rushed up and over her shoulders and down her sides, reaching most of the way down her thighs. It even left a small tickle in her gut, and she squished her thick thighs tightly together with a faint mewl.

Not everything was so great, though. All throughout the pressure of not just Dash's body weight pushed down on her tits. She had been able to ignore it thus far, putting it to the back of her mind, but once more and more of Fluttershy's body and strength came into play...

The relief in Dash's back just seemed to be transferred to her tits. The head-sized melons started to scream, pressed to bursting, and she couldn't take it any more.

Throwing out a hand as she rolled over, Dash snatched Fluttershy by the wrist. Her jaw had gone tense, and her panting came through almost like a growl.

Fluttershy stared down, her free hand tucked close to her heart between her breasts. Her eyes had gone wide, and she stared down at Dash. "D-did I—"

"They hurt, too," Dash said, then swallowed. She pulled on Fluttershy's wrist, tugging her in, then pressed her palm to the top of a breast. She intentionally aimed for the cap, ensuring the nipple brushed against Fluttershy's hand.

Dash couldn't believe what she was doing. What she was saying. Maybe it was just being lost in the moment. Fluttershy's magic fingers felt so gosh darn good, even as the backache came back as a mild undertone.

And yet she kept Fluttershy trapped.

And yet Fluttershy obliged.

She curled her fingers in, squeezing the fat around Dash's broad areola. She groaned out, her vision going blurry while Fluttershy started indulging herself in Dash's tender tits.

"I don't really know how to do this...!" With an audible gulp from Fluttershy, she pressed down a little harder, as well as marrying the other hand to the other tit.

Somehow she'd become even more drenched in sweat, despite barely putting in any effort. More of Fluttershy's bra showed through her shirt, and droplets formed at the tip of her snout.

Rarity once described Fluttershy as having the body of a model. Privately, Dash disagreed. Fluttershy had the body of a pornstar as far as she was concerned.

And to think she didn't dress like one. Fluttershy was just hot without even trying.

Lucky.

It at least made for good viewing as Dash slowly turned into a blue-hued puddle, and the tingling in her belly spread out and down.

The kneading started to work its way outward. Slow, circular motions that turned bigger and bigger, encompassing more and more of Dash's tits.

She actually started to relax. The ache slowly subsided, and she let her head fall limp to the bench. Her breasts still hurt, but the more Fluttershy massaged them, the more something else took over for the pain. An uncomfortable but very welcome heat that made Dash's time in the shower rather pointless as she started to sweat again.

The tingle turned to an ache. Then to a throb. Dash started to squirm, passing her thighs past one another while her knees and hooves took turns slapping the bench underneath her.

Her heart roared in her ears, not so much heard as felt. A drum beat at the base of her skull echoes of it thundering across the rest of her skin.

An internal spark ignited, first at Dash's chest, then deep, deep in her abdomen. She tried to say something, to scream something at that moment. A swear and Fluttershy's name morphed together into a "Fuuucker," while Dash throw her arms down her front and between her legs.

One thought after that entered Dash's head. Not a word, not a thing. Just a concept of ecstasy, pure bliss. She even forgot how to see, to make sense of the yellow coat and the blushing, blue-eyed face.

To think just moments ago her tits had been in agony. Now she'd been reduced to them in a perfect picture of bliss.

That didn't last forever, as unfortunate as it was. Eventually, Dash came down from her high, whimpering on the bench.

Aside from her pitiful sounds, there wasn't another noise in the locker room. As her blurry vision came back into focus, she could see Fluttershy had gone stock still, though she still kept her hands tight against Dash's boobs, fingers sunk into them like plush cushions.

After a few moments of staring, the rest of Rainbow Dash's extremities came back to her. A deep but pleasant buzz in her fingers and frog that ran up her limbs, and an especially strong sensation from her hips that left her legs feeling dead, almost numb.

Her hand felt warm. Hot, even.

Dash sat up, and Fluttershy immediately backed up to give Dash space. She pulled her hand from her crotch, then came to an abrupt stop to stare at it. Every digit on the palm side had been soaked, shining in the light as if her coat had been polished smooth.

"Did I just..." She swallowed as she leaned forward a little more, only to stare at her soaked thighs and soggy shorts.

She had. All over her thighs and the bench. Normally her shorts might just hint at a little camel toe but with the fabric soaked through and the remnants of arousal lingering in her cunt, the shape was obvious.

She finally made eye contact with Fluttershy again. She'd gone dead silent, her face redder than the Acres' produce, while her hands floated in front of her. It was like she was ready to grope again, or had just got stuck like that.

The little wet patch at the front of her yoga pants said it was probably both.

Dash licked her lips and gulped. "You gotta teach me how to do that," she said, and Fluttershy's eyes lit up.

Author's Note

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