Two for the Price of One

by An Intricate Disguise

Rating: mature
Tags: Slice of Life, My Little Pony: Friendship is Magic, Alternate Universe, Other, Porn, Rainbow Dash, Fluttershy, Sex
Length: 5903

After a long day of trading, Rainbow and Fluttershy got an orthros to trade for a book. Only, that deal's now off, but what are they meant to do with a two headed, two cocked dog?

After a long day of trading, Rainbow and Fluttershy got an orthros to trade for a book. Only, that deal's now off, but what are they meant to do with a two headed, two cocked dog?

Give it a bone.

An alternate, more fun/depraved ending of Trade Ya! (Also apparently no one's written orthros porn so there's that!)

Published 2018-10-14 01:20:01 UTC
Last updated 2018-10-14 01:20:01 UTC

Double Dick Deal

"...we really didn't think this through, did we?" Rainbow Dash ran her hooves through her mane as she lazily flapped through Rainbow Falls, feeling dejected by her lack of first edition Daring Do goodness. She turned to Fluttershy, who was walking the orthros they'd recently acquired on a leash. "To think that if we'd been just a little bit faster, we'd have a priceless piece of literature in our hooves! Instead, we've got that slobbering mutt."

The orthros whined a little at this, one of its heads dipping, and Fluttershy turned with a harsh glint in her eye. "Don't say things like that, Rainbow Dash!" She drew a little closer, dropping her tone lower. "The orthros might not be able to speak, but they're a lot smarter than normal dogs. They can understand you perfectly, Rainbow."

"Yeah? So what if it can?" Rainbow turned around to face it, petulant, blowing a raspberry at it. "I don't think you're as good as a Daring Do novel, even if having two heads is kinda awesome! Yeah. Take that." Satisfied with her diss, she turned away, though she soon found the upset of the day coming back to her. She ignored the barks of the orthros as she continued on. "Where'd the rest of the girls get to, anyways? This place seems to be pretty much empty now."

"Oh, I think they went on without us," Fluttershy answered, the bite completely gone from her tone now. "Even the orthros' old owner isn't around anymore, so we wouldn't be able to give him back even if we wanted to..." Fluttershy seemed to consider her words for a second, and then shook her head. "N-not that I want to. I like him. He's a good boy, aren't you?" She turned to scratch each of the heads under the chin, one at a time, and they nuzzled into her hoof.

"Hey, if these things are like, as smart as ponies, why do you still talk to it like it's a dog?" Rainbow asked, eyebrow raised as she found herself distracted from her moping. "Should you really be doing all that 'good dog' stuff like AJ does with Winona?"

Fluttershy shook her head at Rainbow as if she was being silly. "All creatures like affection, Rainbow Dash, and I'm sure if Mister Orthros over here was upset, he wouldn't be wagging his tail so much, would you boy?"

Rainbow had to admit, she was always kinda fond of how Fluttershy's voice could switch so quickly from talking normally to her to doting on an animal. It was almost as if she was always in animal lover mode, and just waiting to jump into the next bout of affection. Plus, watching the big dog react was kinda cute. "Hey, boy." Rainbow said, feeling a little embarrassed as she addressed the orthros. "I'm sorry if I was a little rude to ya earlier. I know you're not a Daring Do book, but I still think you're pretty cool. Just a shame we can't split ya in half so me and Flutters get to keep one head each, huh?"

The orthros looked alarmed at the suggestion for a second, but the moment Rainbow finished her sentence, it relaxed, coming forward and licking at her. She giggled at first, then recoiled when she realised that the thing was still very much a slobberer.

"Heh, jeez, gonna have to work on that, ain't ya?" Rainbow shook her mane, trying to get all of the remaining moisture out of it. "Say, Flutters. What are we actually gonna do with this orthros, anyway? Can you keep it at your house?"

Fluttershy hummed for a moment, tapping a hoof against her chin. "I don't see why not, though it might take a little bit of time for the other critters to get used to him. Oh, I hope they all get along well..." Fluttershy's eyes lingered on him for a moment, then she shot Rainbow a look. "You know, it might sound a little bit crazy, but an orthros can actually be used for various types of pony therapy. They're meant to be really good at relieving stress."

Rainbow could definitely believe that. Her time around Tank had shown her that just having a pet to speak to, or maybe stroke and care for could be extremely calming, especially when she felt upset. "You saying I should give the big old thing a hug?" she laughed, looking it up and down and hoping it didn't try to bundle her.

Fluttershy tilted her head, giving Rainbow an odd look. "Well, sure, I suppose you could start with that. Maybe a couple of strokes behind the ears... They like that a lot." Fluttershy demonstrated by softly rubbing at one of the dog's heads, causing its tongue to loll out as it began to grow excited. "See? And when an orthros is happy, they try to make the ponies around them happy."

Rainbow shot her a confused look, wondering if Fluttershy had forgotten who she was for a moment. "Flutters, I don't really do this lovey dovey stuff. Not with ponies, not with animals. I already told him he's cool, he doesn't need his ears scratched to know it."

"Oh, but he'll like it, Rainbow! You will too, they've got such soft fur, and it's especially thick around this big guy's chest, isn't it?"

Again, she was back to talking at the orthros instead of Rainbow. Just what was the big deal here, anyways? So yeah, it was a big fluffy dog, and it had two heads. Why was Fluttershy making such a thing out of having Rainbow touch it? Knowing there was little chance she'd drop it, and on the off chance that it did actually relax her, Rainbow gingerly stepped forwards. "Fine, I'll give him a little love. But if you tell anypony I was being mushy—"

"Yes, Rainbow, I'm sure you'll huff and puff and blow my house down," Fluttershy grinned, gently nuzzling her side.

Honestly, Rainbow could probably need this right now. If anything, both of them could. They'd been working themselves up all day trying to get that stupid book, it was about time they relaxed. Rainbow looked at the big happy orthros, its tail wagging as it watched her approaching with both heads. Cautiously, she placed a hoof on its neck, then softly brought it up to the back of its head, scratching behind its ears.

It only got more lively and animated, trying to rub its check against her hoof and lick at it. Rainbow couldn't help but chuckle, this creature was actually pretty fun to pet. Not that she'd admit that to anyone besides Fluttershy, of course. As she continued to work on making the taller head happy, she saw Fluttershy beginning to nuzzle nose to nose with the other. Twice the dog needs twice the attention, Rainbow supposed. "Heh, he is a pretty happy boy, isn't he? Or is it 'they'? I don't know how it works with an orthros."

Mainly because she'd never even seen one before, but Fluttershy was happy to explain. "Well, even though they have two heads, they share their thoughts and consider themselves to be one creature, so it is just one 'he', only in two parts." She backed away from her head a little, replacing her muzzle with her hoof. "But you're right, Rainbow, he's very happy. If I had to guess, I don't think his old owner made all that much of a fuss of him."

Rainbow thought that was a shame. She wasn't usually one to go in for cuddles and nuzzles, but this orthros was really fun to make a fuss of, and it seemed so grateful for the attention. While she wasn't really an animal person excepting Tank, Rainbow thought the idea of leaving this thing without even the occasional stroke was quite the crime. "This is... actually making me feel better about everything. Thank you, Fluttershy. For this, and for helping me today."

"Well, don't thank me," Fluttershy smiled, so in her element she might as well have been glowing, "thank the orthros! We still need to think of a name for him..."

"We'll do that later," Rainbow nodded. "Right now, I'm a little curious about the big guy. Where's his favourite place to be rubbed, do you think? I wanna make him happy." She felt a little vulnerable saying such things, as if she'd be made fun of for it, but she knew if anyone would not only understand but support her wanting to give an animal a good time, it was Fluttershy.

And she practically beamed at Rainbow's words. "Well, let's see... Mister Orthros, do you mind rolling over for me?" She turned to Rainbow as he began to do so, an innocent smile on her lips. "They enjoy their belly rubs."

As soon as he rolled onto his back, the two friends were greeted by the sight of a mess of fur, all brilliantly fluffy, leading from the orthros' chest to his belly. More noticeably, however, was the thing that made each of them blush, looking at one another in no small amount of surprise. That was the twin erect cocks that the orthros apparently sported.

"Oh, Rainbow, I think we excited him too much..." Fluttershy whispered, looking to her as she softly patted his foreleg.

"Y-ya think?!" Rainbow shout-whispered, lips parted. "Flutters, it's got two of 'em! And they're, they're—"

"I know, Rainbow," Fluttershy nodded, continuing to stroke the creature as it laid with its eyes closed. "The orthros is typically a rather well endowed creature, you see, and... this one has been attention starved for a little while, I think, so I'm not really surprised that it..."

"Has a pair of massive hard-ons for us?" Rainbow finished when Fluttershy couldn't, looking somewhere between shock and disbelief. "Th-this isn't what you had in mind when you said about stress relief, is it?" Rainbow couldn't help herself, curiosity winning out as she looked over the pair of lightly ridged, red and almost spear-tipped cocks, both of them looking about as wide as a large pony's cock, but more angular, and a little bit longer.

"I mean..." Fluttershy trailed off, her too looking with a barely restrained interest, because how could she not? It was the most auspicious thing in either of their peripherals. "I've heard of ponies mating with an orthros as a means of stress relief before?" She sounded very timid when she said it, looking to Rainbow and being sure to keep her voice down. "While it's not what I had in mind... I guess I wouldn't consider it to be a terrible idea?"

Rainbow's ears twitched as she turned to look at her friend again, who seemed to be licking her lips as she looked at the happily stagnant orthros. "What was that? You're gonna have to speak up, because to me it sounded like you were suggesting fucking a dog."

"Rainbow! Language!" Fluttershy reprimanded, bopping her on the nose. "He's not a dog, he's an orthros, and you'll upset him if you carry on saying that!"

Rainbow rubbed at her snout, cheeks as red as those twin cocks between the orthros' legs. "And the other part? It still sounds like you're entertaining the idea."

"I mean... we could ask it?" Fluttershy suggested, still keeping her voice down. "It's not like it would be such a horrible idea, it certainly seems to be pent up, and honestly... I'm a little curious about what it feels like."

Fluttershy's face was completely hidden behind pink mane at this point, but Rainbow imagined that if she moved it back, she'd find cheeks the colour of cherry tomatoes. Rainbow looked out on her surroundings, the picturesque waterfall, the abandoned stalls, the lack of any sign of ponies... she shook her head. "I-I dunno, Fluttershy. This is like, wrong in some way, surely? Besides, I don't even really know if I wanna, I can't help looking at him and seeing... I dunno."

Fluttershy actually pushed her mane out of her face, raising an eyebrow at Rainbow. "Honestly, Rainbow Dash? Ponies, orthros', dragons... if it can say 'yes', what's the difference? You're feeling stressed, he's feeling stressed... The only question is whether you're, uhm, interested in him. O-or even, in him with me?"

That made Rainbow's eyes widen. The idea had been shocking already, and she'd gotten the inkling that Fluttershy was into it, but would she really want to do something like that together? "Flutters, I've known you since you were a filly. We've never done anything like that together, I've never even known you to get down with another pony... why now? Why here, with me, and him?"

Fluttershy bit her lip, looking from the twin cocks back to her friend and shrugging her withers, wings a little stiffened. "Honestly, I can't lie, the idea makes me... it makes me feel all good and tingly inside, and after the day we've both had, I... I know it was stupid, Rainbow, I'm sorry. I don't want Mister Orthros to be all pent up though. If you want, you can go, and I'll help sort him out so he's not in any pain." Fluttershy smiled at her friend, then returned to rubbing at the orthros' chest.

Rainbow's eyes narrowed as she looked Fluttershy over, whose tail appeared to be hitching up a tad as she continued stroking her new friend. "I-if I did go, what would you do?" Rainbow couldn't believe she was even asking about that, but part of her was curious. She wanted to know just what she might be missing out on, if she could even call it that.

...let's be honest, she could call it that. As much as she was attempting to deny it, she was beginning to enjoy the idea more and more with each moment that Fluttershy reinforced her apparent interest.

"I would help him let off a little steam, Rainbow," Fluttershy said it loud enough for the orthros to hear this time, drawing its attention and causing both of its heads to look up at her. "Would you like that, boy? Would you like it if I helped you get this out of your system?" She accentuated the word by brushing over the creature's belly, hovering just over its twin cocks, and Rainbow lost the battle not to admit to herself how hot that was. Also, the orthros nodded. Like, it nodded a lot.

Okay, so Fluttershy was into this. The orthros was definitely into this. Rainbow was... pretending not to be into this, but her resistance was quickly fading into nothingness. Would it really be so terrible to at least stay and watch, make sure that Fluttershy had everything under control? Oh, who was she kidding, she knew she was going to join in eventually, but it was good to at least pretend she had a little bit of morality left, right? That said, was this even wrong to enjoy?

Fluttershy shifted down the orthros' body, clambering on top of him, her hind legs spread over the creature's chest as her hooves began to move closer to that impressive pair of shafts and the large, heavy pair of balls beneath. Huh, only two balls. Rainbow had been expecting four, but she guessed that would be too silly. Fluttershy was titillatingly close to taking a lick of one of the orthros' cocks, the one on her right, and Rainbow watched with a guiltily aroused anticipation as she took her time, wanting her to just fucking do it already. The orthros could likely feel it too, her breath over its tip, which was already leaking a small measure of precum, and must have been waiting desperately for her to finally progress.

Rainbow wasn't sure who was most impatient in this situation between the two of them, nor was she certain whether Fluttershy was honestly trying to help, or simply having a lot of fun with her situation. Perhaps both. "Now, this is going to be a little exciting..." Fluttershy started, her voice as calming as it was enchanting, like a soft breeze passing over Rainbow's ears. "But I promise it'll all feel much better when I'm done."

With that said, she finally dipped her head, but instead of taking the tip in her mouth like she'd seemed ready to, she ducked low, licking from the bottom of the right side cock all the way to the tip, her long tongue snaking from side to side as she salivated over him. Rainbow watched with hard wings, stock still, unsure what to say or what to do, but unable to break her concentration as the day took a sudden, unprecedented, and extremely interesting turn.

"Holy shit..." Rainbow couldn't say anything else as she watched Fluttershy's head bop back down, this time taking the tip of the thick cock in her mouth and licking around it in small circles, her tongue poking out of her mouth just long enough for Rainbow to catch a glimpse of what she was doing. The orthros' dual pants increased in volume as she began to move her head faster, all the while rubbing at its fur with both of her forehooves, using the creature's chest as a fluffy pillow for her own. Fluttershy treated him very gently, being sure to suckle sweetly and move up and down at a slow pace, likely not wanting to excite him too much too fast.

All the while, Rainbow noticed that she left the cock to her left, the one on Rainbow's right, completely unattended. It almost felt like a crime, like the creature deserved to be being pleasured from both sides, or it'd only receive half the satisfaction it needed and deserved. She stared at the free cock with a lip bitten, feeling the tingle in her body beginning to grow, sure that she was growing increasingly wet even as Fluttershy lathered him in her spittle. When she looked to Fluttershy once more, she noticed one thing in particular: Fluttershy was looking directly at her as she pleasured the large beast.

Almost inviting her with her eyes to come and join in on the act.

Any last resistance Rainbow might have had broke away as she watched Fluttershy push and struggle to take half of the orthros' cock in her throat before pulling out and tapping it against her tongue, a breathy pant and a smile on her face the whole while. Rainbow Dash stepped forwards on numb legs, her tail twirling in circles, hooves shaky, tongue unconsciously trailing around her lips as she sized him up. Just to help the big guy out, she told herself. That was all she was going to do, the only reason she was doing this.

The orthros' two shafts weren't very far apart. As a result, when Rainbow finally sat down in front of it from the opposite side, folding her legs, she was right next to Fluttershy. She could clearly hear the slurp and schlick of each gulp from Fluttershy's hungry muzzle, and it only reminded her that she was leaving all the work to her friend.

That was it, after all, right? It wasn't that she wanted this doggie dick in her mouth, just didn't want Fluttershy to have to go through this alone.

When she pressed her head forwards, finally feeling the soft contours of the orthros' length against her tongue and lips, she could also feel something else, something that somehow made the experience even hotter. She could feel Fluttershy's cheek rubbing against hers as her friend continued to go down on the orthros, the speed and pace even causing their ears to flick together. Furthermore, the cock Rainbow barely held in her mouth throbbed incessantly from the attention Fluttershy gave the other, almost as if their pleasures were somehow linked.

Rainbow had felt enough, she needed to join in. Slipping a hoof down to softly massage his balls, she began to take the large, canine cock in her muzzle, slowly and teasingly, but more for the sake of her constitution than for him. She found that she could take a good deal of him, and furthermore, that he felt pretty snug inside of her velvety throat, almost a perfect fit. Her tongue tapped a soft rhythm against him. She attempted to match Fluttershy's pace, but she knew she'd have to build up to it.

Despite the fact that Rainbow had always considered Fluttershy a very likely virgin, she seemed to be much more experienced in the art of the blowjob, and while she couldn't break away and look at her, she could feel her friend's movements against her. She scooted closer, their manes pushing together and messing one another's up as they both got more into the moment, more desperate to give the orthros what it wanted, or maybe just to prepare it for what would come next.

Rainbow saw that Fluttershy had stopped attempting to deepthroat the creature, and was now pulling back to very lightly suckle on the tip, so she mirrored her motions, attempting to give the orthros identical sensations on either side of its body. The creature howled in approval as they did so, and Rainbow was all too quickly reminded just how obedient it had been the entire time, how still it had stayed. Fluttershy really did command an astounding level of respect from animals.

It was then that she did something that Rainbow considered to be amazing in its own way. She pushed the cock from her muzzle and then pressed it towards Rainbow with her lips. Rainbow attempted to take both in her mouth at once, but she couldn't quite, so she began to lick from one to the other as quickly as she could, her saliva and Fluttershy's getting mixed together. Fluttershy began to do the same, and the pair of them trailed their tongues around the beast, occasionally making contact with one another, and Rainbow felt the soft wetness of her best friend's tongue, a sensation she'd always been curious about, but never expected to truly discover.

When Rainbow Dash once again pulled away, Fluttershy put a hoof around the back of her neck, pulling her back. They both kissed each side of the orthros' two cocks, still pressed together, and shocked into obedience, Rainbow played along. Fluttershy snaked around the side and began to lap her tongue at Rainbow's, and eventually, between the two shafts, Rainbow lost any semblance of restraint, reaching forwards and softly making out with Fluttershy as she began to pump the orthros with a hoof.

Well, that was fucking magical. The two of them reached back down to its balls, each of them taking one in their mouth, or as much of one as they could, suckling and licking at them together as the two heads looked down at them, their hooves lightly brushing from the hoofjob they gave in tandem. As they pulled away, a couple more tender kisses were shared, and Rainbow grinned at her friend. "Is this how you expected this to go down?"

Fluttershy lightly bit Rainbow's lip, following it with a kiss, a light pant to her. "No, but I'm definitely not complaining..." She gave her friend a lustful stare, kissing at the mid-point of the orthros' shaft to show him he wasn't forgotten for even a moment.

"Hey," Rainbow grinned, looking at the big guy one more time. "Up for a little challenge?" She didn't wait for an answer, simply moving forwards and pushing down on the orthros' cock. Fluttershy did the same, and each of them attempted to take as much of him inside of their throats as they could. They both had their eyes closed, so it was impossible to tell which of them won, or even if they drew, but the increased level of panting from their new friend was a reward in of itself.

"You know, I don't think he's finishing from this any time soon..." Fluttershy sighed, slowly jerking him with a hoof as she spoke. "Oh, I hope we haven't made him even more pent up..." She looked to the orthros and ruffled its fur with a hind leg. "Do we need to give you more, boy?"

An emphatic nod, and Rainbow stood up, coughing a little. "H-honestly, Flutters, I think I need a little break before I suck that cock again... that last stint took it out of me." She was incredibly wet, however, if she hadn't been before, to the point that she could feel moisture dripping down her thigh. "Think we could help him... another way?"

Fluttershy took her eyes off of the orthros, studying Rainbow. "Are you sure? I've heard that orthroses tend to be pretty rough... it might hurt a little bit." If anything, when Fluttershy mentioned the prospect of pain, she only seemed excited by it.

Rainbow, however, was a little more skeptical. She took the time to look over that cock one more time. Probably not the best time to admit that she'd never had anything that wasn't a toy in her pussy, and nothing more than half the length or width of that. Still, she was brave to a fault, so she nodded her head, refusing to back down.

Fluttershy nodded, and with a final, long lick, she stood as well, hearing a whine from the orthros as she finally stopped attending to it. "How about it, boy? Would you like to mount me and Rainbow Dash? We'll try our best to be enjoyable for you, we promise..."

The orthros didn't need any form of guarantee. At the word of Fluttershy, it rolled over and stood, lifting up its forelegs and placing them over each of their backs as it tried to bring itself into position. Rainbow and Fluttershy both had to press their asses very close together in order to be in the right place, their tails entwined, and the weight of the large creature bearing down on them all the while.

"Now, Rainbow, if you need to have him pull out, make sure you do it before he—oh, gosh..." She was cut off by the feeling of the orthros' right shaft pressing against her folds, softly caressing her, and Rainbow felt the same, though not in the same place.

"F-Flutters," Rainbow started, tensing as hard as she could, attempting not to let what she was sure was about to happen next happen. "I think he's lined himself up wrong..."

"What are you talking about, Rainbow?" Fluttershy panted, pushing herself back a little, wiggling in place against Rainbow's own hips. "I can feel him lined up right where I want him..."

"Fluttershy, he's about to put it in my—ahh!" Too late, there was no chance to say anything else, as right as the orthros slid its rightmost cock into Fluttershy's perfect, tight, wet pussy, it took the other and began to push it into Rainbow's ass. Whether by design or accident, Rainbow didn't know, but she cried out all the same, pain and pleasure mixing together as inch after inch of the canine length slid inside of her. It was so well lubricated from their ministrations that it hurt less than it might have otherwise, but the sensation of being stretched by something so large was still difficult to bear, to the point that Rainbow felt as if she might tear up if it didn't stop filling her with more of its impossible length.

When it finally paused, Rainbow began to shimmy forwards, hoping to pull out and transfer the cock to her pussy, where she'd wanted it, but the creature moved too fast, intent on fucking the both of them as they stood there beneath him. He slammed forwards with a hard, ravenous thrust, bringing a cry from each mare as they felt his lengths barraging their insides, one embedded in Rainbow's ass, the other in Fluttershy's soft pussy. He worked himself up quickly, refusing to slow down, and as he went, Rainbow struggled to come to terms with the unrestricted force behind the orthros' movements, just how powerful he was now that he was the one in control.

"F-Fluttershy, can you slow it down?" Rainbow panted and grunted, groaned and shook under the weight and the pressure of the cock pumping in and out of her over and over.

"Why would you want to?!"" Fluttershy huffed, her body splayed so much that Rainbow was surprised she hadn't collapsed, her eyes watering and her lip bit hard as she 'mmh'd her way through so many repetitive thrusts, volume swiftly building all the while. "Yeah, that's a good boy... fuck me and Rainbow like you mean it."

Rainbow couldn't believe what had come over her friend, but past her fear, past how much it had initially hurt, she had to admit that there was something that felt fucking good about having her ass pounded like a little slut, about the way the orthros barely controlled its rhythm, moving with a carnal energy and only caring about what it could take from them, how much they could give him before they gave out.

Rainbow could take it, she'd make sure of it. She tried to push back against him, wings fluttering as she attempted to maintain her position, and after a solid minute of adjustment, she began to feel some form of rapture beyond the pain, something that led her to accompanying Fluttershy's moans, shakily at first, but growing all the more bold and boisterous with each slam that resounded through her body.

"Oh, gosh..." Rainbow groaned as her voice cracked, her back arched in such a delectable manner as her wings began to stiffen so much it burned, ass being filled to the point of impossibility, her friend beside her moaning and writhing and begging to be filled up like the whore she was. Rainbow had never seen this side of Fluttershy before, and she'd never realised just how much she'd fucking love to see it again.

Fluttershy began pushing back herself, determined to take some control of the situation, and it was like she just knew how to work magic with animals. The orthros began to slow down as Fluttershy backed up, rubbing her pussy over his cock and surrounding his twitching length with her walls. Rainbow could feel the soft spasms of his length reverberating through the cock that was sank in her ass, and it only heightened the experience, making her want more, giving her that feeling that she was as scared of as she was in need of.

She took a risk, bringing one of her forehooves back and beginning to rub at her sensitive nub, hoping to Celestia that she wouldn't fall from the force of his ramming. She knew how to balance, and she was a tough pegasus, but this was a level of fun and punishment that she'd never taken quite in this manner, and it was becoming so hard to focus on anything but pursuing her own satisfaction.

The orthros eventually tired of Fluttershy's pussy massage, and began to reestablish its dominance, pushing forwards and bottoming out in both mares repeatedly, Fluttershy's pitch growing as she neared orgasm, Rainbow's doing the same, her body thunderous and throbbing with constant tremors, eyes scrunched shut in bliss, her entire being hinged on the coming moment, knowing it would be something that she'd never experienced before, that she'd likely never have again in such a perfect circumstance.

Then, right when she was on the edge of heaven, she realised something that only shocked and invigorated her further. The orthros' thrusts had slowed down, becoming more powerful and deep, and above anything, the tip of its cock seemed to be engorging, maybe on both sides. It felt insane, it felt painful, it felt amazing. Rainbow looked to Fluttershy almost fearfully, still rubbing at her clit, and Fluttershy looked back in bliss. "Wh-what's happening?"

"He's about to knot in us, Rainbow," Fluttershy replied as if she'd just won the lottery, her voice sweeter than honey.

Before Rainbow could question what the heck that meant, she felt a pulse rush through her body, heavy and shocking, and the splash of his load against her insides, his cock only expanding more and seeming to lock in place, the ache transferring to pleasure as she rubbed at herself in a frenzy, Fluttershy now doing the same, both of them feeling burst after burst of the canine semen entering their bodies at a staggering, incredible rate.

Fluttershy was the first to cum, clenching hard before exploding around the orthros' cock, though nothing seeped out, not his cum or hers, as he continued to empty his load deep into her womb. Rainbow had no idea if an orthros could knock up a pony, but right now, that thought was enough to send her into overdrive, and with a final flick of her clit, she too began to cum, squirting thin lines of marecum over the beast's belly, her pussy not restricted like Fluttershy's, though her ass was still being stretched to unbelievable levels, only intensifying the experience.

For a little while longer, they remained inert, riding out their orgasms as the orthros finally finished, soon managing to dislodge from the pair of spent ponies. A heavy amount of semen dripped out from each of them, mottling their furs and staining their tails, but neither of them cared. They laid in the grass, collapsing in a heap of two, Rainbow feeling the rise and fall of Fluttershy's chest only barely against the relentless pulse of her body that only began to quieten after an entire minute of calm.

The orthros, on the other hoof, seemed to be completely fine, as if it hadn't just rutted two mares to the edge of consciousness. It calmly walked up to the pair of them before licking each of their faces, laying down in a ball beside them, and appearing to drift off to sleep, both of its heads looking completely content.

And that's how doggy style was named, kids.

Rainbow eventually looked to Fluttershy with a raised brow, breath caught, knowing that something needed to be said. "So... about that." Honestly, how else were you meant to approach what had just transpired?

"Y-yeah, about that..." Fluttershy didn't seem to have the courage to look at her. Seemed all the bravado had left her with the orgasm. Which made sense considering she was apparently a closet freak, not that Rainbow was complaining one bit.

"I don't know if we can really keep something like him around... he's a bit big for even the two of us to handle." It pained Rainbow to admit it, but she also knew she was right. What if the orthros tried to mount either of them in public, or even worse, another pony? They were both just lucky that nopony else had been around when they ended up taking him for a spin.

Fluttershy hummed in thought for a moment, likely knowing Rainbow to be right, until eventually, an idea seemed to hit her, a smile appearing on her face. "I bet Celestia and Luna would adore him, and I know they'd have the space. We could still visit too, I bet!"

Rainbow looked down to her and her best friend's cum-soaked bodies. "Good. Because I wasn't giving up on that experience any time soon."