Pony’s Best Friend

by Birdybirdbird

Rating: mature
Tags: Rainbow Dash, Porn, Sex, Fetish, Non-consensual, Winona, My Little Pony: Friendship is Magic
Length: 3386

Canine on equine. What more could you want? (Bestiality ensues).

If you read the description, you know what you’re getting into. You’re welcome, ‘cause to be honest, there aren’t nearly as many dog on pony smutfics as there should be.

In heat, Rainbow Dash is a victim to her body’s needs, controlled by them as she can’t help but give into her urges and masturbate in an orchard. Unfortunately for her though, there was an onlooker as she relieved herself, and on spotting him, her body didn’t let her refuse Winona’s clear interest in her sopping snatch.

Art by Welost and Aer0 Zer0
2695769 on Derpibooru

Published 2023-10-27 21:20:00 UTC
Last updated 2023-10-27 21:20:00 UTC

“Good boy.”

A glide.

Yeah, that’s what this was. A peaceful glide through Ponyville as Rainbow Dash stretched her wings.

It was supposed to be a workout, with intense exercises and manoeuvres planned for the toned pony to train her body to it’s limits (she wasn’t a Wonderbolt for nothing after all). She wanted to be zipping around and having the time of her life, kicking clouds and exercising and whatnot.

However, what she instead found herself doing was, like previously stated, gliding.

And why? Because of a constant ache in her marehood. A burning sensation in her body making her pony snatch dribble occasionally onto the helpless ponies below.

In other words, Rainbow Dash was in heat, and every atom in her body was crying out for her to cease the flying and get some cock already! Or at the very least shove her hoof between those fat thighs of hers and rub like there’s no tomorrow.

Uggghhh! Why me?! Why couldn’t I be born a stallion so all I’d have to deal with is flying around with a boner?! Clearly, she wasn’t enjoying herself up here. It already wasn’t easy for her to zoom around with her plump rear and sizeable tits trailing behind her, but now, with her body being unwilling to fly and her wings already aching, Rainbow Dash gave up. Fuck this!

She had a strong will, but no training was worth this. Plus, she’d already heard a few mares cry out after they’d realised it wasn’t rain that had fallen on them, so Dash opted to retreat.

I’ll head home, fuck myself silly on my biggest dildo, maybe reread Daring Do to pass the time, bounce on the dildo again for good measure, and try again tomorrow. At least she wasn’t giving up yet.

Changing direction, Rainbow turned to flap herself home. It would be a long journey, but one that’d be worth it in the end.

…Wait a sec’… On second though, perhaps she’d worm herself out too much today. …Ah, shit. With only a few beats of her wings, the panting mare was truly and utterly worn-out, unable to make it even halfway home like this. Worth it in the end or not, she’d rather not collapse on the way there.

Having no choice and feeling herself starting to descend, Rainbow Dash used her remaining energy to make her way over to a small cloud. And with great effort, she fell back onto it, sinking back into the plush mass with her legs spread, chillaxing the best she could as her sopping cunt winked madly.

“UUUUGGGGHHHH!” Rainbow Dash would’ve given anything to quell the burning in her body, and even more to stop the constant thoughts of cock that her mind kept forcing onto her.

There was one thing that could calm her body, if only a teeny bit…

She couldn’t. But she would.

Slyly, her hoof slithered down her front, sliding smoothly between her bouncy crotchboobs and coming into contact with her sensitive clit, a jolt slamming through her body on the mere touch.

“Ngah!” Moving down further, she let her hoof place itself over her lips, bewitched by need.

And she didn’t hesitate any more than that.

Pushing down hard, the mare tried containing her moans, but failed mostly as she began grinding up and down, sloppily masturbating above the public, available for anypony with wings to watch. “Gnh! Angh! F-Fuck! Gah!” It was a mess, or rather, she was.

Without thought or reason, Dash ground her hoof up and down on her pussy without shame. Grunting, the world around her was entirely ignored. She wasn’t thinking about how she could be seen here, she wasn’t thinking about her climax that would surely splat down onto her victims below, she only thought about her climax, the just out of reach end to her lewd shenanigans.

“Guh! Fuck! Nngh!” Her hips were shoved forward, reaching out for more of the sensations shooting up her spine, all whilst her mind was flooded with images of girthy horsecocks. She was dreaming vividly of what it’d be like if she could have just one, dreaming of how it’d smell on her face, how it’d taste as she sucked it dry, how it’d feel inside of her as she was plowed mercilessly. “AHN!”

There it was, the climactic feeling she’d been longing for, rising through her to explode out.

Rubbing at full speed, Rainbow offered her abused snatch no remorse, making whorish faces as she was about to cum. All it would take… was a little… more…

CRASH!

In a body-wracking instant, the trance was broken. Rainbow was still horny, unbelievably so, but with the massive crashing below her, her senses came back to her, and the sweaty, disheveled mare with a sopping wet hoof realised exactly what she was doing.

OH SHIT! Up to her tired legs she jumped, shocked at her own actions. I-I-I’D JUST BEEN FUCKIN’ RUBBING MYSELF SILLY ON A CLOUD?! Frantically, with her flank dripping away behind her, Rainbow Dash peered over the edge of the cloud at the scenery below. A-ANYPONY COULD’VE SEEN ME! She had to thank Celestia that the cloud had drifted away from the village, but still…

If any random pegasus had decidedly to go on a fly today…

If a mare or stallion had found her, then her reputation could’ve been ruined forever.

And if a really scummy stallion had found her, then her reputation could’ve been ruined, AND she could’ve ended up leaving the situation with a foal in her belly.

But she sighed in eternal relief. Nopony had found her, and the great Rainbow Dash’s reputation was safe. She allowed herself some time to relax as she watched the expansive orchard of Sweet Apple Acres below.

Her relaxation lasted mere seconds though, because then it returned, with a vengeance.

Ugh! Shit! Furiously now that the promised orgasm had been stripped from it, Dash’s pussy screamed at her. It was like what she’d been feeling earlier, the debilitating horniness and need, but this time so much stronger.

What she had no choice but to do was go and get somewhere private, THEN she could ‘relieve’ herself (or in other words: sluttily rub her snatch before spraying out her mare-cum violently).

Where am I gonna go for privacy though? There would be very few places around Ponyville that she could just masturbate, but she was in luck, because she didn’t need to find some secluded area, not when beneath her there was now a thick forest of apple trees to hide her from any onlookers.

Sure, there was a chance one of the Apples might be down there, but with how big their farm was (and how her body wasn’t letting her choose) Rainbow would take that risk.

With a swift neediness, the hot and bothered mare dove from the cloud, and felt the wind push against her curvy, juicy, sweaty body as she descended rapidly. Past the leaves she soared, until the awesome and incredibly horny Rainbow Dash was obscured under the foliage of apple trees, a decently thick forest surrounding her.

She never got to admire her beautiful surroundings though, or even enjoy the pure calmness and isolation around her. Instead, the needy mare didn’t want to suffer any longer, and instantly leant her body against a tree with her front hoof, slipping the other one down underneath her as she instinctively shoved her rear out.

I swear to Celestia this better help! Being in heat was a nightmare, and if she had to go through the rest of the season this horny, this helpless, then she might go insane. But here she got the chance to relieve herself, hoping desperately that this would help her at least a little.

Again, rapidly, Rainbow’s hoof started mashing against her pathetically begging pussy.

Her tail was flagged, her ass was out, her nipples were hard as could be and her juices were falling down to the floor. At the same time, the air began filling with her pungent stink, and the fragrance of a mare in heat began wafting through the forest for any nearby fauna to smell.

If anything were to attract any creature nearby though, it would definitely be the tauntingly tempting smell of sexual desperation, but beyond the smell, there was the sound of a horny mare too…

“Sh-Shit! Ahn! Fuck! Guh! Ng-Ngah!” Besides wet, lewd sounds coming from between her fat cheeks, the athlete-turned-whore cried out. She didn’t let herself beg for cock, but the thought was always there, her mind never leaving how fantastic it would be if a stallion just approached her now and bred her like a broodmare.

Soon, on the thought of how it’d feel to have her womb filled, Dash’s orgasm threatened to burst. It took a bit too long for her liking, but now, maybe, the agony of heat would dwindle.

“Ngh! Nearly! NEARLY!” Her hoof was a blur, and the juices were sinking into her fur as she ceaselessly continued. But after so long of trying and trying and trying, rubbing and never slowing once, she finally came, and mare-cum squirted from her like a jet. “AAAAAAAHHHHN!”

Gritting her teeth, she had to hold the tree to keep from falling as her body was wracked by the sensation, but then it ended, and the rising tension faded as she could rest.

It’s… over. She’d came, and now that the feeling was leaving her, Rainbow moved to take all the weight off her tired legs.

Heading to the same tree she’d leaned against, the mare rest her sweaty back against it, and slid down the bark lazily until only her head was leaning against it. She was quite the sight lying on her back. Her vagina was pointing out and still dribbling as she laid in some of her own juices, her legs spread ridiculously wide. But Rainbow Dash didn’t care. The heat this year had been the worst she’d ever felt, so now that she’d dealt with it, she was more than willing to-

Uh oh.

There was a tingle, a tiny speck of a feeling in her marehood, but from her past heats she knew what it was, and knew what would inevitably happen after.

Please, please, PLEASE! No! In can’t do that again! Building up in her body, the awful heat rose and flooded her once more. It’d left her, but now was back, persistently starting at her snatch and spreading to convince her to give in and find a stallion. Don’t make me go through that again! I don’t usually beg for thing, but- As if asking for mercy, Rainbow Dash’s head rose to look down at her limp body. Between her legs, her genitalia was still there, burning for the billionth time, but as she looked down at it, something else caught her eye, cutting her thoughts off as her head suddenly turned to it.

Not far, past a few trees, Winona stood, AJ’s dog. He was just staring at her, unmoving as their eyes met.

“Winona?” It was a nice distraction from her predicament, with Rainbow’s attention now on the dog. What brought him here? It must’ve been the smell… And I was being pretty loud…

As her body refused to move, Dash watched as the usually chipper dog silently walked over to her. It was a strange moment, but as she gazed back at him, his eyes moved down, and he began staring at her presented pussy just there for the taking.

What is he…? She was confused, and the confusion lasted until, like his, her eyes trailed down, and widened dramatically when they saw what was between his legs.

Red. Hard. Throbbing. Bobbing under him with each step, Winona’s doggy cock visibly pulsed before her, erect for her, horny for her, and clearly, if his eyes weren’t deceiving her, wanting her.

“No.” She knew what was going to happen next, and couldn’t have it. “Oh no no no no no no no!” She wanted to move, but couldn’t. Not only was her body in desperate need of rest, but there was something in her wanting this too. The thought disgusted her, but the sight of cock, even a canine one, was already making her pink walls wetten, preparing for entry. “W-Winona! No! B-Bad dog! G-Get away!”

The dog didn’t mind her pleas though, not as it continued its march and neared her, giving Rainbow a better sight of the girth it wielded.

It wasn’t as big as a horsecock, but was still definitely very large for a dog.

The animal’s girth had veins running up and down it, pulsating hornily and moving blood through the excited meat as he took his final steps towards her. The bulbous knot, the large, furry balls, the virile dog-cock, Rainbow didn’t like the sight of any of it, but as Winona bent down to sniff her cunt, she knew her fate was sealed, watching on in horror as the beast placed it’s paws on her belly and mounted her.

“P-Please…” With no intelligent thought behind it’s eyes, the dog ignored her, only thinking about satiating it’s needs in the fertile mare as it’s thick head prodded her entrance. “Ngh!” An exhilarating pulse shot through Dash’s body, but she didn’t dwell on it as Winona happily and animalistically pushed his hips forward. “ANGH!”

The tip pried past the outer walls, her body practically begging for it to enter as they clung down on the filthy animal fuckstick. It felt amazing, easily better than masturbating had, and she sadly knew it’d only get better from here as her newest lover kept pushing.

“A-AHN! NGUH! F-FUCKING DAMN IT!.” Growling out her words as quietly as she could -not wanting to bring any attention to herself- Rainbow despised how perfect the cock felt inside her. Sliding against her walls, moving in almost effortlessly, the knotted girth hit every spot she could want it to, not that the dog cared. Winona was just happy he could get such pleasure from the helpless, heated mare.

Very quickly, everything but the knot was in. Rainbow felt wrong, dirty, violated, but the pure ecstasy coursing through her stopped her from even trying to move. He wasn’t even touching her womb, barely stretching her cavern out, but deep down, Rainbow didn’t want the animal’s irritatingly enjoyable advances to end, her subconscious wanting him to keep going.

And so he did.

“GUH! F-FUCKING SHIT!” Having no hesitancy, Winona pulled out, unsheathing himself and letting his canine cock leave her tight grasp. That didn’t even last for a second. Immediately afterwards, he pushed himself back in, not starting off slow and instantly pistoning himself in and out of the equine pussy, his tongue hanging out of his mouth as he panted.

His victim loved it.

“NGH! FUCK! AH!” His knot kept hitting her puffy lips, his balls kept slapping against her donut, and mercilessly, he broke her will like a twig as she began crying out, uncaring of if anypony stumbled upon a dog having his way with her. “AHN! YES! FUCK!” Rainbow’s eyes rolled to the back of her head, and on occasion, her tongue shot out of her mouth too, joining his as they lewdly panted together. “S-SO GOOD! DON’T STOP! PLEASE! I… I NEED MORE!”

Begging for a dog to fuck her was a new low, but that’s what Rainbow Dash had been reduced to: a needy bitch in heat, needing to be bred by a mindless dog.

And though he didn’t understand, Winona was joyously willing to listen to her words, thoughtlessly plapping mare cheeks as his hips slammed over and over and over again against her. It wasn’t like he needed anymore encouragement though, not with how good his big, bad pony-fucker felt when breeding her.

Slap! Slap! Slap! Slap! Slap! Slap!

With the onslaught of pleasure, Rainbow had lost any sense of shame (but she had long ago, really). Her heat had done what heats do, and made her mind forget all dignity, forget all consequences, and forget just how wrong this was supposed to be. Whereas any normal, sane mare would be horrified at the prospect of a dog cumming in them, Rainbow Dash embraced the idea. Or rather, she begged for it. “AHN! I’M GETTING CLOSE! HNGH! C-CUM IN ME! PLEASE! DUMP YOUR LOADS IN MY WOMB! FILL ME UP! ANGH! I NEED IT!”

Her climax was approaching her, not another unsatisfying one though, this one would be different. Why? Because Winona was getting ready to cum too, her doggy-cock already dribbling a little precum into Rainbow’s sopping wet pony pussy.

Without slowing, slamming desperately into it’s mate’s genitalia, the dog sped up, getting faster and faster as it yearned for the feeling building up in it’s groin.

And then, with his virile vigour at it’s horny peak, ruthlessly mashing the vulnerable pussy he’d helped himself to, Winona slammed into it a few more times, his small hips hitting her cheeks violently before he pushed forward one last time, and wedged his knot inside of her.

Encapsulated by her heat, it swelled, and the dog’s bulb locked them together as it’s testes clenched. The tip of his cock was pressing against the entrance to her womb, and with the dog having gone motionless, wrapping its front legs around her belly and clenching like the animal it was, he erupted inside of her, and filled Rainbow Dash’s womb directly with his feral spunk.

She howled, accepting the gift forced upon her.

Over the course of a long, heavenly minute, load after load of fertile dog-cum was pumped into Rainbow. She felt every drop of it enter her, and smiling drunkly, she laid her head back on the tree, revelling in the feeling of the fire in her body fading, and leaving them both satisfied.

Minutes passed, and the atmosphere of contentment remained, until eventually, Winona got bored and began trying to pull back, yanking his knot against her entrance.

“Gah! W-Winona!” It felt a little good. The entire dog’s cock was still in her, so as it was jostled around, jolts were still sent through her body. There was pain there too though, and because of this, Rainbow sat up, reaching her front hooves down to try and stop the animal mindlessly trying to escape her depths. “Ngh! S-Stop!”

Her efforts were in vain. What little she could do from here was pointless, and so, with enough constant effort and struggling, Winona slipped his bulging knot from her pussy, letting some of his cum dribble out of her and down into the grass.

As he stepped back though, she rested, regaining her energy now that her body let her.

And then it hit her.

“HOLY SHIT!” SHE’S JUST FUCKED A DOG! WHAT THE FUCK?! SHE KNEW HER HEATS COULD GET BAD, BUT A DOG?! A MINDLESS FUCKING ANIMAL?!

She was baffled, shocked by herself and how she just let her will break like that.

But then something else hit her; a realisation.

She didn’t regret it.

Better yet, Dash had enjoyed the dog fucking her, and could even feel herself get a little horny again at the thought of it happening again…

With the new shocking thoughts rushing through her head, Rainbow stood up, getting up onto all four hooves with ease now that she could actually move again.

She could still feel his cum sloshing around in her, as if the dog had claimed her, making her it’s property.

As she looked down at it, she expected herself to feel disgusted, but as Winona stared back up, she just felt that horniness again, an exhilarating feeling as if she was willing to go for a second round with the animal.

“I’m fucking disgusting.” She didn’t bother letting herself hide the fact, and as she turned to walk away and think about this more, she glanced back over to Winona, staring the dog in the eye as Winona just glanced as the pussy he had just made his, feeling his still erect cock throb. “I… I might be back tomorrow…”

She came back later that night.

Author's Note

The wiki says Winona is a girl, but fuck that, she’s a boy now, one very hung for a dog.