House of Horny Horses

The next morning Limestone’s belly was still swollen. Macintosh felt her watching him jealously across the breakfast table, looking away only to glare at Marble, whose turn was today. Marble smiled smugly back at her, which made Limestone tremble with rage.

Macintosh and Limestone had sex three more times yesterday, and each time she’d enjoyed it more, while he’d enjoyed it less. The third time he took almost an hour to cum, and in the end they’d had to resort to calling Apple Bloom in to rub her ass in his face so he could force out one final load.

Now, somewhat restored by a good night’s sleep (in a bed by himself, thank Harmony) he wondered what to expect from Marble. He tucked into his eggs and gravel muffins, thinking he should ask Apple Bloom what Marble was into; but when she was done serving breakfast she and Marble went off to Marble’s bedroom before he could ask.

Without Marble to explain board game rules, Macintosh, Applejack, Maud, Limestone and Pinkie were at a loss to entertain themselves. Pinkie suggested they play War, which Macintosh was fine with initially. He’d like the game as a colt. But after a few rounds of play, he realized that the game was completely random, and the only thing he was doing was turning over cards.

Without Marble to restrain her, Pinkie began making up rules. An hour later, they were building card forts and rolling marbles at them, which the mares all enjoyed. But Macintosh’s hooves were too big and clumsy to stack cards, and if he tried to use his mouth the cards got wet.

“All set, daddy!” called Apple Bloom from Marble’s bedroom.

Whatever was in there, it was better than this nonsense. Was Marble a virgin, too? She was awfully shy. He hoped not, though. Virgins were challenging. Ideally, she’d be nice and experienced with simple, normal tastes…

Macintosh opened marble’s door to find her trussed up like a hog at a rodeo and hanging from the ceiling. “Oh holy mother of Harmony.”

“Do you like it?” said Apple Bloom, beaming.

Macintosh tilted his head to one side. “I can’t rightly say.”

Marble's eyes began to tremble and moisten.

Macintosh waved his forehooves frantically. “No, no, you’re beautiful! I just… I’ve never done bondage before.”

“Don’t worry! I did all the hard stuff!” said Apple Bloom, chest thrust out proudly. “I put her at the right height and everything!”

Macintosh walked around Marble slowly, contemplating. His cock slid out of his sheath and stiffened until he was so hard his flare kept getting tangled in his forelegs.

His eyes were drawn to the way the ropes and the corset-like saddle she wore hugged her strong but curvy body. Ropes dug in around her tummy and teats and pulled her thick ass cheeks apart to show the bases of the butt plug and dildo stuffed into her rear holes. Ropes around her thick thighs spread her hind legs, tying them to the same ring on the ceiling that held her main body. Her forelegs were tied together and down to keep them helpless and out of the way; her hooves dangled half an inch above the ground. An odd bridle, complete with dangling reigns, covered her snout; the bit spread her jaw open and held what looked like the base of another dildo inserted into her mouth.

Her neck was held still by a strap tied between the back of her head and the base oh her tail. Unable to move in any way, her eyes rolled to track Macintosh as he walked around her. The effect, for him, was at the exact mid-point between insanely arousing and extremely disturbing.

“What do I do?” he asked.

Apple Bloom grinned. “Anything you want. She’s helpless. She’ll tap on the floor three times with her forehooves if we hit a boundary. But she and I had a long talk about it and she doesn’t have any. Leastways, not any you’re likely to cross.”

Macintosh raised an eyebrow. “So why does a mare who’s experienced at expert level BDSM need my help getting pregnant?”

“She doesn’t. She just thinks it’s hot to get knocked up by her cousin.”

Marble let out a muffled, gurgling “Mmmmhmmm.”

Macintosh cringed. He cared about his hypothetical future foals and wasn’t sure about putting one in a mare who just wanted to be bred for sexual reasons. But he’d take care of it if he had to.

“You seem hesitant,” said Apple Bloom. “Want me to demonstrate?”

“Eyup.”

Apple Bloom stood on her hind legs on Marble’s bed, which had been pushed to the edge of the room. She wore black stockings, a black bow, black lipstick, and a sort of harness of straps that served no purpose except to draw attention to her pussy lips and teats. It was cute, he guessed, but he hoped they didn’t expect him to put on an outfit. She hooked a hoof in Marble’s reigns and swung her over. She eased the dildo out of her mouth, and pulled… and kept pulling. The thin, floppy silicone dildo was over three hooves long. Apple Bloom held it sideways in her mouth like a pirate on a romance novel cover, and mashed Marble’s snout against her crotch. Marble was able to get her tongue out through the bit and slathered it lasciviously over Apple Bloom’s dripping cunt.

Apple Bloom picked up a riding crop from the bed and tapped Marble on the cheek with it. “Bad slut. No stampeding for the clitoris. Lick my teats first.”

Macintosh watched with a mix of protective jealousy and perverted lust as Marble ran her tongue back and forth over his little sister’s nipples.

“Don’t just stand there with your mouth hanging open, daddy. She’s got a whole other end.”

Macintosh sniffed tentatively at Marble’s dangling rear. She smelled like lube, rope, rubber, lust, estrus, and a dry rock smell similar to Limestone’s. The way they ropes squeezed her ass cheeks into tight hemispheres was unnatural and disturbing, but it also made his cock pulse. He wanted to bite them, so he did. Teeth sinking slowly into firm flesh. Tongue against silky coat. Marble moaned hungrily into Apple Bloom’s cooch.

“Oh, she likes that, daddy. Do it more,” purred Apple Bloom, tousling Marble’s mane like she was a dog.

“Mmmhmmm.”

She looked down at Marble and tapped her on the cheek with the riding crop again. “Don’t stop licking, whore.”

Macintosh groaned and moved to gnaw on Marble’s other cheek, covering its smooth roundness with glowing pink teeth marks. Marble had such a perfect ass — not that there was a shortage of perfect asses in this house, but it was so much thicker than her older sister’s. He traced the edges of her crack with his tongue, eying the base of her butt plug. It was very thick, distending her glossy ponut into a thin gray ring. He wasn’t supposed to fuck that — he was supposed to be making foals, here, not plowing posteriors for his own personal pleasure. But it wouldn’t hurt to have a look in there, would it?

He waited until Marble hit a good spot on Apple Bloom, making his little sister’s eyes roll back into her head in pleasure, and gently wriggled the plug out of Marble’s ass. It came free with a soft pop, dripping lube. He gasped — his cousin’s ass was beautiful. Gently fluted pink flesh leads back into mysterious darkness. Lube thick enough that you could probably drive a train in there glistened on the room’s soft light. He glanced up at Apple Bloom again. Still distracted. He made eye contact with Marble. She was quite aware of what he was doing and gave him the slightest little nod.

Macintosh grinned and mounted his cousin. His flare poked against her well-prepared ponut. He felt her squeeze it open for him, and he slid right inside. Bliss. Marble’s soft, tight intestines massaged him, caressed him, welcomed him in. He sank deep into her — where his sister’s virgin pussy had been an unmarked trail, her ass was a well-traveled four-lane highway. He rode that highway nice and slow, observing marked speed limits, all the way up to his balls — the big advantage of anal was that he didn’t have a depth limit unless his partner was shy about having their internal organs rearranged. Then he picked up speed fast. He wrapped his forelegs around Marble’s pouty, rope-corseted tummy and rammed his belly and balls against her plump, muscular ass.

Marble groaned and squirmed back against him, eyes rolling back into her head in pleasure. Macintosh gave her a nice, sturdy shove, jamming his massive cock as deep into her guts as it would go. Drool trickled out of the corners of her mouth. Macintosh grinned — this bondage thing wasn’t so bad.

“You enjoying that pussy, daddy?” purred Apple Bloom, looking up into his eyes. Their heads were almost level in this position; leaning across Marble’s suspended body brought her delicious lips barely an inch from his.

“Eyup,” said Macintosh, lying by omission.

“You gonna make a foal in your cousin?”

“Eyup,” he said, lying explicitly.

Apple Bloom narrowed her eyes lasciviously. “You gonna kiss your little sister?”

Macintosh slid his tongue into his sister’s mouth with all the not-very gentle passion he was hammering his cousin's ass with. He jammed his tongue into her mouth like a cock, filling her to the top of her throat. He felt her groan into his tongue, felt her beginning to tremble as Marble’s tongue brought her closer and closer to ecstasy. His cousin’s bowels flexed around him. Her bound thighs clenched against his hips. Her ass and tail rubbed against his belly. He could spray inside Marble’s ass at any second, but he though she might be the type who could cum from anal, and he wanted to give her plenty of time for that. He could feel the dildo moving through the thin wall of flesh between her asshole and her pussy; he didn’t know what it felt like to have a pussy, but he imagined being stuffed in both holes must feel amazing. Getting it up the ass sure didn’t suck; he knew that much.

Macintosh thrust his cock deep into Marble, squishing her snout against Apple Bloom’s crotch, grinding his balls against the dildo base sticking out of her pussy. Fuck, fuck, fuck, her guts felt so good. He had to stop kissing Apple Bloom and grit his teeth to keep from cumming.

He clenched down the muscles deep behind his balls to keep from cumming and lost himself in his sister’s gentle kiss. Her tongue moved against his as she moaned, her cries becoming deeper and hotter as Marble’s expert tongue pushed her up to the edge of orgasm and kept her there.

“Fucking let me cum, cunt slave,” Apple Bloom growled, grabbing Marble by the ears and yanking her forward. Marble squeaked. Apple Bloom yowled. Macintosh watched a ripple of pleasure move through his sister’s body, furs standing on end as pleasure melted her brain. “Ah! Ah! Ah!” squealed Apple Bloom. Her eyes rolled up into her skull. Her tongue lolled out of her mouth. Drool dripped from her chin.

Macintosh felt Marble convulse around him. Her thighs shuddered against his hips. Her ass muscle clenched down around his cock shaft so hard it forced the blood painfully up into the crown.

That was too much for him. His orgasm started deep behind his balls and spread out, burning up his spine as cum shot through his cock. He felt his balls pulsing; somehow even after all the work he’d done the past two days he could still put out a massive load.

Pride filled his heart as he slid his dick out of Marble’s ass and huge amounts of cum flowed out around it. He was amazingly fertile, and…

“Macintosh!” said Apple Bloom. “You wasted it!”

Macintosh’s pride turned to shame. His shoulders slumped. “Eyup.”

Appl Bloom glared at him. “You wasted your cousin’s time. And mine. You proud of that?”

“Nope.”

Marble giggled.

“Oh, were you in on this too?”

“Mmmhmmm.”

Apple Bloom bapped Marble in the nose with her riding crop, and lay down on her belly on the bed with her forehooves hanging over the edge. “Bring that big limp hose over here, daddy. I’m gonna suck it hard again.”

Macintosh’s eyes widened. “It’s been up her ass.”

Apple Bloom smirked. “And I bet giving your innocent little sister an ass-to-mouth is gonna make you nice and hard again, isn’t it?”

Macintosh nodded so hard his brains rattled. He stood over Apple Bloom, forehooves on her muscular ass cheeks, and she took his cock in her hooves, rubbing the slimy, limp shaft against her soft face. He moaned as he felt her tongue lapping his cum off the shaft. Blood pulsed through it and he began to stiffen. Apple Bloom wrapper her lips around his flare and sucked, draining any remaining cum out of him. He gasped, feeling her jaws widen as he hardened. He pumped his hips, pressing his flare to the top of Apple Bloom’s throat, but she wiggled away. His crown popped wetly from her lips.

“You ready to fuck again?”

“Eyup.”

Apple Bloom tapped his cheek with the riding crop. It stung more than he’d expected. “That’s a good soldier. Get it right this time, okay?”

She helped him get the butt plug back in Marble’s cum-dripping ass and eased the colossal dildo filling Marble’s pussy loose. Mare goo flooded out around it and drizzled onto the floor. Marble was very, very horny. Her cunt gaped wide at first, just as pink and enticing as her ass had been, but quickly closed to a tiny slot little wider than Limestone’s. Macintosh leaned forward to sniff at it nervously.

“It ain’t gonna bite you, daddy,” said Apple Bloom. “And I don’t think she needs foreplay. Stop staring like a fool and get your big fat foalmaker in there.”

Macintosh reared up over Marble and bashed his cock against her opening. Apple Bloom held Marbel’s hips steady and helped guide him inside of her. His cock sang with pleasure — Marble’s little cave was almost as tight as Limestone’s but more used to heavy traffic. She moaned and arched as he hammered away, driving himself in up to the medial ring before hitting resistance. Marble jerked and threw her head back as he bumped her womb hatch. Macintosh paused, suddenly worried if he was being too rough.

“You okay?” he said.

Marble thrashed and tried to talk, her voice unintelligible though the bit in her mouth.

“I think she wants it harder. You want it harder, Marble?” said Apple Bloom.

Marble nodded as hard as her bindings allowed her to.

Apple Bloom grinned. “I think you’ve got a green light to go to town on that pussy, daddy.”

A shiver passed up Macintosh’s spine. He shook his mane out to clear his head, hugged Marble’s middle tight, drew his hips back, and slammed his flare into her womb hatch. Marble squealed and bucked, helpless underneath him. He jammed himself forward again, her cunt gripping him hard. He wanted the go deeper, but the harder he thrust, the more the stupid bondage tackle let her swing away from him. Frustrating.

There was nothing for it but to grab a mouthful of her mane. Thus secured, he thrust forward into her, pounding, pushing, enjoying the feeling of her tight, sloppy wet pussy gripping his cock. He pulled back to the medial ring on every thrust, making sure it plucked against her clit.

This technique paid off quickly. Her pussy began to spasm around him, then clenched down hard. He groaned at the sudden pressure, and bucked forward into her, resiting being pushed out. Whatever nerves this motion hit worked well for her — her tunnel quivered, then clamped down again, her whole body shaking as a second, more powerful orgasm took her. He let go of her mane and tugged her back so he could get a look at her face. Her eyes were glassy, her tongue hung out of her O bit, her breath was fast and hot. He pushed her forward until his medial ring was pressed against her nub, and jerked her back and forth on the rope tying her to the ceiling.

“Mmmmmgggnnnh!” said Marble, eyes rolling up into her head. She slouched in her bonds, panting, sweaty, expression dazed.

“You fucked her stupid, daddy,” said Apple Bloom, bouncing up and down on her four hooves excitedly. “Now cum in her!”

Macintosh groaned. As much as he was enjoying this, his balls felt dry. He worried he wouldn’t be able to finish. “Do me a favor, Apple Bloom?”

“Anything for you, daddy.”

“Can you eat my ass while I fuck her?”

“Can I!” His little sister was out of his sight so fast she blew up a dust cloud. He felt her cute snout wriggle between his ass cheeks and her tongue slide against his ponut. He rocked back and forth between the two mares, two-thirds of his cock buried in Marble while his little sister’s tongue wormed its way up his ass. His worries floated free from his mind. His balls tightened. His sister’s long tongue found the special spot inside of him, and a wildfire broke loose. Massive gouts of cum gushed through his cock, pumping hard and fast into Marble’s battered womb. Trapped inside her by the tight fit of his cock, it swelled rapidly until her belly strained at the ropes binding it.

“Ah! Harmony!” moaned Macintosh as pleasure roared through him. When it left, his balls ached and his limbs felt weak. He slid out of his cousin. His limp, over-sensitive cock slipped free, followed by a white river.

Marble tapped her forehoof lightly on the floor three times. She was ready to be let go. Apple Bloom worked quickly, handing Macintosh rope after rope to hold as she unbound her cousin.

“Doing okay?” said Apple Bloom, helping her down on to the floor.

“Mmmmhmmm,” said Marble, looking tired but satisfied. She shook pins and needles out of her legs and climbed onto the bed. Apple Bloom and Macintosh followed her, stroking her and praising her.

“You did so good in there,” said Apple Bloom, massaging her forelegs. “A real trooper.”

“That was incredible,” said Macintosh. He ran his hooves over her body, examining where the rope had left furrows in her tender flesh. He followed one around her hip and down her pelvis, then caressed the lower cusp of her swollen belly. “I love the little cum tummy your family gets.”

“Good to cuddle with,” said Apple Bloom, curling against her front.

“Eyup,” said Macintosh, wrapping his forelegs around both of them and pulling Marble’s back against his front.

“Mmmmhmmm,” said Marble.

They lay like that until they all drifted into an afternoon nap.