Incestuous Pony Antics (w/ self insert OC)

Shining Armor smiled and kissed his sister lovingly on the lips from his position mounted on her weakening frame. “I wish we could stay like this forever,” he whispered, feeling his cock finally begin to soften just a tiny bit.

“Me too, Shiny…” she moaned into her brother's mane, though her body clearly began to twitch and tremble its way back toward equilibrium, tightening on Shining’s rod until he finally couldn't take the pressure anymore.

“Ahh, fuck!” he gasped into her tricolor mane, his cock slipping free of her outer lips as he nearly tripped backwards on his own hooves. He was forced to dismount the princess, and then he stood waiting there, looking at the cummy mess of her quivering marehood just inches from his face. He had an urge to bury his muzzle in those folds and get lost in the sticky wetness of his sister’s well-fucked cunt.

A slutty cough escaped Twilight Sparkle’s throat, but only a moment of  awkwardness passed between the two.

“That was beautiful, my love,” intoned Pinewood from his vantage point on the bed. “Now that you have more cum filling your delicious sex-toy body, I want you to try the spell we discussed earlier. I know you have plenty of skill and mana for it.”

Shining Armor turned toward the earth pony, slightly confused. He almost opened his mouth to ask what spell Twilight might be using, but Pinewood’s commanding gaze made the white unicorn grind his teeth shut. Clearly this was something that Shiny was supposed to witness without giving his input.

“Um,” Twilight began, not sure exactly how to warn her brother while still obeying her Master. She decided that nonverbal direction would have to do. “Just…” she gulped, suddenly feeling somewhat… hungry and insatiable when looking at the chiseled jaw line of her white-and-blue unicorn sibling.

The princess slowly turned around, then hopped up on the bed in the clear space Pinewood had left for her. The green earth pony stood up expectantly to the side of the luxurious bed, watching as his beloved Twilight took a reclining pose on the sheets.

“Just take a taste,” Twilight said to her brother, lying on her back and spreading the messy beauty of her crotch wide for Shining to see. Her left forehoof traced its way down her downy chest until the soft fur below her belly parted so enticingly for his entranced eyes. She was far too beautiful for words, and the come-hither look in her eyes was all he needed.

He was hungry. “Uh,” the white unicorn mumbled as he leaned toward the bed, his legs finding a stable position between the floor and the mattress while his muzzle made a beeline for the double creampie of his sister's pussy. “Oh, fuck,” Shining groaned when his lips made contact with the alicorn’s twitching clitoris, and both ponies’ horns began to glow with a sensual aura. Shining felt his spiraled head-bone throb hard, as if Twilight was tying her own magical prowess to some essence that he'd offered her. It felt good, though, to keep sucking and slurping on her growing clit.

Shining licked, teased, and kissed his way down the outer lips of Twilight’s sex, cleaning any globs of seed that he found along the way. Some of it was familiar in taste, like when Cadance had made him clean up his own cum after their marital romps. Other sticky white strings were muskier, a little less salty, and most of all so intoxicatingly masculine… certainly Pinewood’s deeper deposit from earlier, scooped out by the flared ridge of Shining’s cock just minutes ago. And all of these sweet and creamy flavors were underscored by the heady aroma of Twilight’s ever-present lubrication, that morning-dew of feminine wetness that even now seemed to gush forth from the depths of her pleasure cave. He reached the bottom edges of her labia and cradled a tongue-full of the three lovers’ emissions, dragging his whole muzzle back upward through the mess while swallowing. In any other context, the slow and slimy trip down his throat would have made him rethink what he was eating, but to ingest this heavenly cocktail of fluids… it was so filthy and wrong as to make it irresistibly right. He ended up on her clitoris again, and with a suction that nearly popped his ears, began to polish that throbbing little knob in earnest.

“That's it,” she encouraged him, wrapping her hind legs around his head as he began to lose himself to the dancing button against his tongue. “Good boy, Shiny…”

While his thoughts swirled strangely, making Shining Armor moan and writhe unlike any masculine stallion before or since, Twilight’s clit continued to increase in size. Throbs and uncertain hip-thrusts pushed their way into the white unicorn's muzzle, and soon enough he couldn't even find the cum-filled entrance of her inner lips with his tongue. Those folds had seemed to seal shut, growing firmer and more desperate with every velvety heartbeat under his probing tongue.

“Hmm?” the unicorn grunted, pulling his lips away from Twilight's crotch inquisitively.

“Don't stop!” she moaned, pressing his head down with one hoof. A brilliant magenta flash suddenly filled the bedroom as her spell crossed its point of no return.

Shining Armor immediately recalled Pinewood’s rude insertion into his muzzle, because for some reason Twilight's clit was growing inch by inch into the likeness of a stallion’s veiny pride. Fuck, it really was a fucking cock, wasn't it? He wiggled backwards, trying to extricate himself before the swelling head of Twilight's clit grew completely into a pulsing rod inside his throat, but the alicorn's thighs were too tightly wrapped around his head.

What the fuck? he cried out, reverberating inside the minds of both Pinewood and Twilight Sparkle.

“She's using your own testosterone to try out masculinity for herself,” Pine explained. “Also, some of my dominant hormones are involved. Struggling will get you nowhere.” The green pony grinned, trotting around to stand behind Shining Armor’s rump.

“Hrg?” the white pony gagged, completely unprepared to have his throat fucked by his sister. The head of Twilight’s cock, though not as thick as Pinewood’s, pressed uncomfortably into Shining’s esophagus. He had no choice but to swallow hard, feeling a searing throb of pain rocket through his entire body. He’d timed it completely wrong, a rookie cocksucker mistake, and was paying the price now. Tears welled up in his eyes when finally the next pulse of his sister’s new member forced a wet glob of precum directly into his aching throat, lubricating the rest of her length and allowing her to hilt herself eight inches into Shining Armor.

“Celestia! Fuck! Keep sucking!” Twilight Sparkle moaned, her eyes rolling back in ecstasy. She could feel the tightness of her brother’s muzzle along every sensitive new inch of her stallionhood, and even though the fine lavender fur of her crotch now almost filled his nostrils, she felt the drive of her new cock begging for more. Deeper. She needed to be deeper inside him, and it was so tough to hold herself back for another moment.

Pinewood smirked and hopped up to mount Shining’s flank, bringing his teeth down gently on the white unicorn’s left ear while his veiny green monstrosity probed up Shining’s thigh and between the cheeks of his rump. “I’m so glad you decided to join us, Shining,” grunted the earth pony. “And I bet your ass will be almost as tight as your sister’s.” Pinewood knew the dripping faucet of his own eager precum must be coating the base of the unicorn’s blue tail with so much lubricant that it would trickle down onto the darker anal ring below.

And then, there was a loud squelching POP, and Shining Armor’s eyes widened when he felt the steely tip of the dominant stallion’s hardness find its mark and dig its way six inches deep with a single thrust. He was an anal virgin no more.

FUCK! bounced back and forth along the mental link between the ponies, as Shining felt his mind nearly overload with pain and pleasure alike. He’d never been taken this way before, though Cadance had helped him to experiment with toys sometimes. Something was different. Not just the throbbing insistence of the real thing currently violating his innards, but something different about himself. Was there some kind of thaumic reflection from Twilight’s spell? Was the tingling flesh of his backdoor somehow… more sensitive? More willing to be… prodded and…

Shining Armor felt the painful spasm of a gag build from his abdomen up until it made his whole body quiver and reject several inches of Twilight’s shaft. She kept him pinned just enough that her cockhead lay on his tongue, oozing salty liquid. He was barely able to breathe around it, blinking hard to clear the tears from his eyes. Then the pain began to subside, and a warm fuzzy feeling now radiated across his skin. He felt flushed, rosy-cheeked, and most of all ready for the promise of pleasure from the two cocks now spitroasting him.

“Good boy,” sighed Pinewood, letting his weight shift and pivot so inch by inch he’d slide into the unicorn. Simultaneously, Shining’s frame would be forced forward and down onto Twilight’s dick. “There you go, Shining. I knew you’d enjoy it, but that was an even quicker adjustment than I’d thought. Go on, try some motion.”

The purple pony opened her eyes again, looking down to watch the last couple inches of her newly created cock slip away into her brother’s throat. She exhaled a slow hiss through her teeth, trying to control her own breathing and keep herself on the slightly more relaxed side of the orgasmic climb. Now she caught Shining’s gaze as he experimented with his tongue, lovingly giving back to him her facial expression of bliss to show how much she was enjoying this treatment.

Though he was very much pinned between the two other ponies, Shining Armor was still able to fidget his body from side to side. He found that by arching his back, he could pull away from Twilight’s crotch slightly, and though her cockhead still plugged the entrance to his throat, he could do quite a bit of gymnastics in this newfound space with his tongue. Carefully he swirled the muscle around Twilight’s dick, tracing up and down a vein that seemed to pound hard with desire. He kept a close watch on his sister’s lovely face, trying his best to see her reactions and figure out what she liked. The fluttering of her eyelids was probably the best reward he’d ever had, and when he felt her hoof start to idly caress his mane he knew he was tickling a good spot between the stiff core of her shaft and the spongy cumtube that ran along its underside.

Pinewood slowly pulled himself backwards, savoring the way his newest conquest was just beginning to learn how to tighten or relax in response. He held his long green cock barely inside Shining’s ass, on the verge of popping out even, and squeezed his pelvic muscles for a few throbs in time with the thumping of his heartbeat. The stretched anal ring of that royal white rump below him squeezed back, as if begging him to stop the tease and get on with the fuck. Pinewood grinned. Soon, yes very soon he’d give that slutty stallion enough to make him walk funny for a week.

Shining Armor realized that he’d been holding his breath for nearly two minutes now, and though he could probably go longer with magic, he took this opportunity to back himself up two inches onto Pinewood’s cock. In the process his throat freed its tight grip on Twilight’s member, and he was able to take a few deep breaths while she gasped and squirmed under his muzzle. He continued his attention on the ridge of her cockhead and was rewarded with another delectable dribble of precum directly onto his tongue while he played with the sensitive opening at the end of her dick. Why was he acting like this? Shining hadn’t shown even half as much enthusiasm when he’d taken Pinewood’s cock into his throat, and here he was trying to earn high marks for effort and technique.

“Ohh, Shiny…” moaned Twilight Sparkle as she began to grind her hips up and down, her soft rump lifting away from the sheets before falling back down. She was tingling all over and her horn was glowing with a low steady burn, a fizzle of magenta light that illuminated the sultry features of her face. She traced the edge of her brother’s muzzle with her hoof until she could feel the way his lips slipped so wetly around her cock as she thrust upward, begging him to open his throat again so she could fuck him harder. “Deeper, again!” she gasped, unable to really make a complete sentence around all the elongated vowels that she vocalized. “Pleee-ease, Shiny!”

“I think you’d better ramp it up, boy. Your sister and I are getting a little impatient.” Pinewood waited until he saw Shining Armor’s chest expand with a deep breath of air, and then the green stallion suddenly thrust forward again. He grunted with pleasure as he felt the immediate warmth and tightness of Shining’s innards spasming around his length, but this time the unicorn took it like a pro.

Shining Armor pushed back hard against Pinewood’s crotch, humming happily around his sister’s cock. He felt so delightfully full, like this was something he’d been missing all his life. Grinding his belly against the silky sheets, he realized that his own cock wasn’t even hard! Sure, he had just finished unloading a huge load into his sister, but he was so incredibly turned on right now that it was surprising to find his cock soft and hidden within its sheath. He was leaking an unending stream of precum, though, lubricating the dark folds of skin there and matting the white fur of his belly. “Mmmff…” he moaned again, louder, sending a buzzing vibration into Twilight’s thick rod before taking another deep breath inward.

Twilight knew what that sharp inhale meant. He was ready for her to fuck his throat. She gripped his head between her hooves, forcing his muzzle down until she felt her cockhead pop through the muscles that separated his mouth from the deeper recesses of his esophagus. Fuck, it felt so good to just play with that barrier, even better because she’d already known for herself how painful and pressurized it felt to be the one giving the oral service to a well-endowed stallion. She recalled how Pinewood had abused her throat-muscles before, and, savoring the memory, decided to give her brother an equally advanced workout. She deserved no less than outright cock-worship on her magically provided member, after all.

Out… slurp… Shining Armor stared directly into his sister’s eyes as he swirled his tongue around her cockhead immediately after she pulled him up enough for him to do so. Then when he felt her push down, he swallowed hard to engulf her thick ridge with his throat.

In… throb… Twilight squeezed her thigh muscles around Shining’s neck and saw the rising up of tears in his eyes as his throat was forced to swell around the pounding veins of her shaft. He’d always been such a jock, and now to bring him down to her own level… Just a cocksucker. No dominance of his own. It gave her such a rush to share this intimacy with him, and then when she focused on Shining’s rump, getting so steadily reamed by her Master’s cock… Twilight Sparkle’s body flexed and strained, and she felt the beginning rumbles of cum pressurizing her heavy balls. Oh yes. She wanted to feed her brother such a thick load to reward him for being such a good little fucktoy for the two of them.

Out… Shining Armor simply couldn’t get enough. Sweet Celestia why did it feel so good through all the pain? His entire body was electric with pleasure, and Pinewood was still only giving him the first seven inches of that irresistible dark green tool. The unicorn swore he could feel every branching vein, every sliding fold of sheath skin, every delightfully hard nubby protrusion that crowned the thick head of Pinewood’s cock. And he loved it all, needed it all to slide in and back out, raking its way across his now-stretched innards, coating his intestines with the sticky sweet nectar of Pinewood’s balls.

The green stallion couldn’t stop himself from leaking precum if he tried. He’d found a good rhythm now, humping in and back out perhaps once or twice every few seconds, savoring the way Shining’s tail twitched and tickled his belly fur every time he plunged into his new little anal slut. So incredibly wet in that tunnel, it took every bit of his restraint to just slide in until he felt the resistance of Shining Armor’s deep inner ring. That second barrier could wait just a little while longer; he didn’t want to cum before Twilight did.

Of course, the princess was already nearing her point of no return. In, then out, then in again, her cock began to reach a new level of hardness, and its flaring head a new pleasurable level of sensitivity. In, out, in, out, in she directed her member into Shining’s throat. Though now she knew there would be a steady flow of tears from the pain she was causing his abused muzzle, she didn’t care. Out, in, out… then one last squelching in was tougher than before, and required more force from her hooves down on Shining’s head, and caused her to cry out, realizing she’d been holding her breath-- “Oh god, Shiny!” Twilight moaned, finally unable to hold back the impending torrent of seed now rising powerfully up her shaft. “Swallow it all!”

If the Princess of Friendship was adorable, beautiful, cute-- any number of words that had certainly been used to describe her unforgettable face-- now she could only be described as passionate. Her mane was messy with sweat so it clung to her slender neck. The campfire-like glow of her horn now burst forth with a brilliant firework of colors, some of them impossible neon blends of hot pink and ultraviolet. Her muzzle scrunched up with the effort of her orgasm, and she whimpered over and over in time with the squirts of her cum directly into Shining Armor’s belly.

The white unicorn, being so mentally linked with his sister through magic, felt his own pleasure spike at the same time as hers. Sparks of blue fire erupted in tandem from his horn, and he felt the unmistakable pulsing of his own pelvic muscles as he spilled his load directly onto the sheets below his flaccid prick. The fact that he couldn’t breathe at all didn’t bother him, and he strained his neck muscles hard in order to impale his throat as completely as he could onto Twilight’s spasming cock. His lips met the very base of her crotch, sucking and slurping and daring her to keep squirting rope after rope of thick cream into his throat.

Just moments after Twilight Sparkle and Shining Armor began their orgasm in unison, Pinewood felt the ricochet of muscle tightness bounce its way through the unicorn’s body and around the earth pony’s cock. Pinewood groaned and sped up his thrusts now, helping Shining to keep his muzzle fully stretched around Twilight’s purple tool while the green stallion knocked even harder on the tight inner ring of Shining’s intestinal maze. In, out, in, out… Wildly thumping heartbeats of all three ponies were pounding, pounding and yearning for release in their bodies and minds.

Now was the time to give him every inch.

In. And then even deeper in. Pinewood grunted with effort and shoved his way through that previously untouched tightness, and suddenly felt his own cock reach its fullest ever hardness as he flared wide inside the white-hot depths of Shining Armor’s ass.

“Hrg!” It wasn’t a true gasp, as that would have required air to escape from Shining’s lungs. Twilight’s cock was far too thick to allow that right now. But still the poor abused unicorn felt a searing pain inside him where Pine’s cock had brute-forced its way into a deeper and tighter secret of his belly. It hurt to push back, but that was what his body’s reflexes were doing now, rippling and pushing back to try to reject that baseball bat of a horsecock. But the round muscles failed to resist such a complete entrance, and when Shining Armor felt Pinewood’s balls slap wetly against his own, he knew he was done for.

On top of the mental and oral orgasm he was still receiving from his sister’s throbbing throat-fuck, Shining Armor felt his entire body reel hard from the first shivering pulse of pleasure of a true anal orgasm. He’d never felt like this before, tightening his rump muscles around the flared head of Pine’s cock and milking it for all it was worth. Shining felt the first hot jet of cream, a real stallion’s cream, paint the inner walls of his belly, and he bucked his hips with enthusiasm backwards another inch to tightly hilt himself as a lowly cocksheath around Pinewood’s amazing pleasure-stick.

“Fuck,” the green stallion growled, flexing his body backwards and feeling how his cockhead didn’t budge from the impossibly tight folds that pulsed around it. “Take it all, boy!” The second spurt of Pine’s seed was nearly a pint of liquid alone, and he was just getting started. He opened his eyes through the haze of orgasmic pleasure, and saw Twilight’s cock throb its own seventh jet of cum into Shining Armor’s throat. The unicorn was being filled from both ends now, and his belly began to swell slightly as if he’d just had a big meal.

Throb. Three, four, and five squirts of Pinewood’s powerful masculine flow now filled Shining Armor’s rump, and the hot liquid swirled around Pine’s cockhead, bathing him with his own passion in a slick stew of hormones. He felt the rising pressure inside Shining’s belly now, and with a hard thwick he pulled himself back just enough to unplug his flared cockhead from that second ring of Shining’s intestines. Six, seven, and eight more pumps of his cum later, and the amount of seed that filled the unicorn’s backdoor now surely neared a gallon, and it was clear there would soon be very little room remaining.

“Do you-- hhaaann…” began Twilight, trying to ride out the last few pleasurable throbs of her cock’s expenditure before she began to deflate in her brother’s throat, “need a break, Shiny?”

The white pony shook his head from left to right once, squeezing his tongue against the underside of her cock and swallowing the waning flow of her cum. Being a stallion himself, he knew that unless she got a huge influx of mana soon, her hardness would have to take at least a short break after such an explosive orgasm. He could handle holding his breath a little while longer, and the warm pool of his sister’s cream that filled his stomach now was perhaps around half a gallon. A lot, but still manageable. Not painful.

In his rump, on the other hand, Shining Armor realized that Pinewood’s cock was still pumping cum a full pint at a time deep into him. Over a gallon and a half now must have been forced into his intestines, and showed no signs of slowing. With his mouth still tightly wrapped around Twilight’s member, Shining Armor raised his eyebrows at his sister inquisitively.

“He won’t stop until…” Twilight explained, wondering if she should intervene and ask her Master to go easy on her brother for now. But then again, the white stallion seemed to be handling himself quite well, especially the emotional side of taking so much abuse from both ends. “Until he feels you’ve been trained. He loves to take a pony past the breaking point, to make you belong to him.”

Just then the pressure inside Shining Armor’s belly reached a painful climax, and he grimaced with the development of this new discomfort. Throbs of continually added cum now met with a tight cramping action inside his digestive tract as his body tried in vain to force over two gallons of cum to move back out his rump, but Pinewood’s cock remained diamond-hard to make a good seal against Shining’s anus. Only a tiny little dribble of white escaped between that veiny green monster and the spasming ring, and the pinned unicorn curled his legs beneath him to try and focus his mind on anything other than the pain deep inside. His belly was swollen now to nearly twice its normal size, and though he wanted so desperately to prove that he could handle Pinewood’s offering, he felt a reflex of sickness begin to overtake his entire body.

Seeing her brother struggle like this, Twilight was torn. On the one hoof she wanted to use magic to make it easier for him, but on the other, Pinewood wouldn’t stop until he’d truly broken Shining. So, much like confronting an issue head-on, she decided to ramp up the pain for her brother, to quicken the inevitable. She rubbed her own body up and down with her hooves, spreading her wings out and embracing Pinewood above Shining Armor’s prone body. She used every bit of her remaining magic to keep her cock hard now, and then she pulled herself back so her cockhead was freed from Shining’s throat.

The unicorn gasped for air, strings of cum hanging from his lips while his tongue mumbled something against the thick purple gag of his sister’s cock. “But I don’t want to be trained,” it sounded like he said.

“Too late for that, slut,” responded Pinewood, and he pushed himself forward until he popped through that tighter inner ring again, forcing the next few jets of his cum to flood the fucktoy’s upper intestine.

Gagging and coughing loudly, Shining Armor bucked back and forth, trying to pull away from Pinewood. It was useless, and Twilight pushed her cock again into his throat. This time he wasn’t ready for it, and both ends of his body reflexively spasmed to reject the cum from his body one way or another. There was simply no room left for it, and the leak between Shining’s anus and Pinewood’s cock became a steadier flow now, squirting slightly back out onto the green stallion’s thigh with every thick pulse he forced into the unicorn.

Shining Armor, the captain of the royal guard, expectant father, icon of masculinity… reduced to a blubbering red-eyed mess. The rivulets of tears that ran down Shining’s face now mingled with the overflow of cum from his lips, and visual stimulation for Twilight was enough to drive her to a small aftershock orgasm now. Just a few quick bursts of cum that alone wouldn’t be too much to handle, but with the overwhelming pressure already inside his belly, Shining simply couldn’t swallow it.

Heaving his abdominal muscles painfully, Shining Armor gagged and gagged and loudly gagged again, expelling a mixture of Twilight’s and Pinewood’s cum from his throat. It cascaded in a thick bubbly waterfall down his sister’s purple cock, and the wet slurping sounds of seed and throat-slime were exactly what Pinewood wanted to hear. The green stallion gave just a few more hard thrusts, each one accompanied with several mouthfuls of cum that overflowed from deep inside the unicorn up his abused throat like a lewd geyser to coat Twilight Sparkle’s belly and thighs. Perfect.

Finally stopping his several-minute-long orgasm, Pinewood moved his body backward and dismounted Shining Armor. Over a gallon of seed immediately rushed out from the gaping ring of Shining’s ass, before the unicorn whimpered and sat backward, trying to tighten himself back up. His belly was still swollen, and perhaps an equal volume of cum remained inside his body, sloshing around and aching a little less now that he’d given up on holding it all.

Shining Armor pulled his head up off Twilight’s cock now, and let the remaining mouthful of cum that had refused to stay in his belly fall down in ropes across her deflating shaft. Sheepishly, he tried wiping his muzzle, but both of his forehooves were already covered in cum so it was no use. He sat there for a moment, dazed and clearly unsure of what to do next.

Twilight gave her brother a knowing look. “Welcome to the club,” she teased him, cleaning his chin with her wing. The white goo on her feathers was certainly a good look for her, and for a moment Shining wanted to ask to cum on her body. But that thought quickly quieted itself when he caught Pinewood’s eye.

Shining Armor found it hard to keep eye contact with the dominant stallion. So this is what submission was like. Interesting. It was especially telling that he seemed to have an urge to clean both of the semi-erect cocks around him, and still quite strange to feel his own member so soft and hidden in its cummy sheath. Truly he’d have some deep thinking to do after this experience.

“Um… Thank you? Sir?” the unicorn tried, unsure of what to really say.