Marble awoke to footsteps passing by her room, cracking an eye open she noticed the sun hadn’t risen yet. Rubbing her eyes she stumbled to the door and peeked out to notice Pinkie’s rear as she descended the stairway downstairs.

“Sis?” Marble whispered at the retreating figure but to no effect. Stepping into a pair of slippers she kept by the door Marble exited her room as she went to follow her sister. Reaching the stairs she caught sight of Pinkie, completely nude, ambling towards the kitchen. ‘Oh jeez she must be sleep walking again’ Marble thought as she went to catch her sister before anyone else caught sight of her. Moving down the stairs as silently as possible Marble scampered after her. As she rounded the corner to the kitchen she caught sight of Pinkie, bent over the kitchen counter gnawing at the remains of a pie which had been left over from dinner the night before.

Pinkie’s prodigious rear swayed happily back and forth as she devoured what remained of the desert. “Mmmmmmm” she hummed as she greedily stuffed the pie into her face.

Marble stopped and blushed at the sight, even though Pinkie was her sister the sight of a curvaceous mare practically presenting herself stirred Marble’s loins. “Umm, Sis? You know you shouldn’t be snacking at this hour,” Marble murmured, trying her best to avert her gaze from the pink mare’s ripe behind. Edging closer Marble reached out to tap Pinkie on the shoulder but was stymied as Pinkie angled her ass towards her.

“Nooooooo, this is my pie! You’ll have to find your own,” Pinkie sleepily groaned before turning her dreamy eyes towards her sister, her pendulous breasts swinging as she moved

“Pinkie,” Marble’s blush deepened and as her marecock began to rouse itself. Noticing her cock begin to lengthen Marble pulled her shirt down in an attempt to quell the beast but to no avail.

“Heeeeey, what’re you hiding?” Pinkie fully turned to address Marble, still enchanted by whatever dreamscape in which she found herself. Taking a step forward Pinkie reached down towards Marble’s hands, now desperately trying to restrain her cock from springing into view.

“No no no no no,” Marble squeaked as she took a step backward. Unfortunately, due to the impeccable cleaning skills of their mother the floor had nearly a mirror finish and the grey mare lost her footing, tumbling backwards onto her behind. “Eeeek!” she quietly squealed as her hands went flying in an attempt to catch herself, her cock bouncing from beneath her night shirt.

“Ooooooh, I see. Someone was trying to be sneaky,” Pinkie cooed as she stood above marble, her arms akimbo as she sleepily looked upon Marble’s juicy cock. Sinking to her knees Pinkie slowly began crawling between her sister’s legs. Marble, to her credit, tried to backpedal but was halted as the larger pink mare grabbed her by the ankles. “Sharing is caring Mister Cupcake,” Pinkie groaned as she pulled her sister closer. Pinkie continued to pull herself closer to Marble until her nose pressed against the base of her sister’s shaft. “Mmmmmmm, I love eclairs,” the pink mare softly moaned as she ran her tongue up Marble’s length and to the broad cock head.

Looking down as Pinkie began licking and slobbering on her dong Marble stifled a moan, throwing her hands up to her mouth. Pinkie continued to lick and kiss along Marble’s length until she raised her head and practically inhaled the grey mare’s entire cock. Wincing and throwing her head back as Pinkie’s throat milked her marecock Marble writhed helplessly, trying fruitlessly not to enjoy the sensation of the phenomenal blowjob that her own sister was giving her.

Pinkie expertly bobbed her head up and down the bloated and throbbing cock flesh, her throat bulging with each plunge as nearly a foot of horse cock effortlessly slid into her mouth. How the pink mare was able to accomplish such a feat without gagging was beyond Marble let alone the fact that she was still sleeping while doing so. Despite the incestuous taboo the sheer sensory overload of the situation began wearing at the grey mare’s mind, it’d been far too long since she’d gotten this sort of attention. One of Marble’s hands slipped from her mouth and to one of her plump breasts, massaging and rubbing her nipple as her sister continued to service her. A small gasp escaped her as Pinkie withdrew the throbbing rod of grey flesh from her mouth, giving it a little kiss before looking up at Marble.

“I’m sorry Mister Cupcake, you look so lonely up there,” the pink mare whispered as she began to crawl up Marble’s supine form, her heavy breasts dragging across her sister’s frame. Pausing as her breasts pressed against Marble’s own bosom Pinkie dreamily looked down at her wide eyed sister before slowly reaching down to take each of Marble’s hands in her own. “You always did have the sweetest kisses,” the pink mare whispered. Pulling Marble’s arms to her side and pinning them against the floor Pinkie began to messily kiss her way up the grey mare’s neck towards her lips. Marble’s feeble struggles faded as the pink mare’s lips locked with her own, sloppy with pre-cum and sweetened by the pie she’d been devouring Marble thrust her tongue into Pinkie’s mouth.

Pinkie blissfully moaned as she felt Marble’s erect cock buck between her plump ass cheeks. As if on instinct Pinkie raised her hips slightly allowing the towering horse cock to find her marehood before bearing down and impaling herself upon it. Marble’s eyes shot open at the sensation, groaning into her sister’s mouth as she was enveloped by the moist confines of her sister’s snatch. Bucking her hips Marble began to mindlessly rut her sister as they continued to sloppily kiss, their tongues entwined.

Marble’s mind snapped, finally fully succumbed by the sensory overload as her hands flew to Pinkie’s hips. Digging her fingers into the pink mare’s juicy ass Marble began to senselessly fuck her sister, moaning despite herself at the irrationality of the situation. Arching her back Pinkie began to rhythmically bounce on Marble’s cock in tune with the thrusts.

“Come ooooooon Mister Cupcake I want that eclair cream!” Pinkie groaned as she reached down to harass Marble’s fat tits, twisting and pinching each nipple.

Marble’s eyes rolled into the back of her head, her tongue obscenely lolled out of her mouth. With a final grunt of effort she drove her entire length into Pinkie’s cunt, penetrating her cervix as her cock pulsed and swelled in climax. The grey mare’s cockhead flared, effectively locking itself into the pink pony’s womb as nearly a torrent of potent mareseed spewed forth. Pinkie shuddered as the sensation overtook her, causing her to climax and collapse atop her sister. The two lay nearly motionless on the kitchen floor save for the fitful thrust or two as Marble’s orgasm faded.

Catching her breath as her mind cleared Marble looked up to see Maud standing in the doorway wearing a nightgown, laconically looking upon the indecent scene before her. “Sis!” Marble blurted as she tried to scramble from beneath the now snoring Pinkie, “It’s not what it looks like.”

Maud stoically observed as Marble removed herself, her cock popping from the pink mare’s cunt and leaving a trail of jizz and juices behind. “So I didn’t just observe an act of incestuous carnality on the kitchen floor? How odd,” Maud monotonously pondered as Marble regained her footing.

“P…p….Pinkie just. And then the. B…b…but I was going to,” Marble stammered uselessly as she faced the apathetic Maud.

Maud calmly placed a hand on Marble’s shoulder, “I’ll get her upstairs and back in bed. I’d suggest you tidy the kitchen before mother or father awaken.” Stooping down Maud casually lifted and cradled the pink mare in her arms before wordlessly turning and proceeding towards the stairway. Marble scrambled to fetch a mop from the closet, her cock swinging as she darted about slinging ropes of mare seed across the already moistened floor. Maud shook her head at the absurdity of what she’d just witnessed. As she reached Pinkie’s room and lay the snoozing pink pony on her bed Maud looked down at her. Surveying the plump, full figured, mare Maud felt a slight tingle in her nether region…

Author's Note

So here's chapter 2, the byproduct of too much coffee an caffeinated chocolate. There's probably a few punctuation and/or grammatical errors in there but it should still be enjoyable. Also there's still more in the pipe for this story so stay tuned!!!