“Alrighty Sis, the shower is all yours!” Pinkie cheerfully says as she saunters out of the bathroom and past Limestone who’s tapping her foot impatiently on the floor. Toweling off her head Pinkie’s cotton candy-esque hair springs back to its normal fluffy state.

“It’s about time, I’ll be lucky if there’s any hot water left!” Limestone grumbles, casting her eyes to the floor to avoid looking at her sister’s curvy frame. Pinkie, always having been blissfully uncaring about being nude around her sisters, began skipping down the hallway towards her room.

“Awww, don’t be such a grouchy grouch Lime. I know you missed me,” Pinkie chirps as she wraps Limestone in a hug from behind. The pink mare’s damp and supple bosom presses against her smaller sister’s back.

“Quit it!” Limestone groaned while wriggling out of her sister’s grasp.

“Well I’m going to hit the sack Sis, it was a long ride from Ponyville and I’m bushed,” Pinkie said as she released Limestine. “I’m gonna sleep like a rock,” the pink mare said with a giggle before disappearing into her room.

Limestone sighed and shook her head before entering the bathroom, closing and locking the door behind her. Stripping off her tanktop and shorts Limestone started the shower, taking a moment to look at herself in the mirror. Smaller in nearly every way than Pinkie her breasts were perky and athletic compared to her pink siblings massive udders. Inspecting her reflection Limetone gazed down her athletic frame before it drifted down to her crotch and the obscene marecock that dangled from it. Pinkie was the only Pie sister that didn’t sport a cock which wasn’t all that surprising given how much of an oddball the pink mare was anyways.

Stepping into the shower Limestone began lathering herself in the warm stream of water, her hands rubbing a bar of soap across over her velvety grey coat. Setting the soap down she washed her breasts and huffed, “Stupid pinkie and her fat tits,” the grey mare cupped her smaller bosom, “Think’s she so hot with those obscene things jiggling around all the time.” Looking back Limestone inspected her own sculpted rump, giving it an affectionate squeeze, “She wouldn’t be so squishy and soft if she had to work the farm every day like the resto of us!”

Thinking of Pinkie’s soft and supple frame Limestone felt a twinge in her groin, the thought of her sister’s ample tit flesh pressing into her back fresh in her memory. Reaching down Limestone started washing her cock, stroking its length with her soapy hands. Flashes of her pink sister’s jiggling ass skipping down the hallway flashed through her mind as she stroked her dick. Shaking her head and clearing her thoughts Limestone growled in irritation. Hopping out of the shower and wrapping herself in a towel Limestone stomped out of the bathroom and towards her bedroom, one door down from Pinkie’s.

As the grey mare passed Pinkie’s room she noticed that the door wasn’t fully closed. Limestone rolled her eyes and went to close the door but what she saw inside gave her a moment’s pause. Pinkie lay spread-eagle on the bed, fully nude and snoring slightly. Lime’s cock reflectively jumped at the sight and sinister thoughts crept into her mind at the sight. Looking back and forth down the hallway Limestone crept into Pinkie’s room and silently shut the door behind her.

Standing over Pinkie Limestone gazed across her pink sister’s form. Every part of pinkie was big, from her thick thighs and wide hips to her ample tits. “Stupid big titties,” Lime grumbled to herself as she reached down, digging her fingers into Pinkie’s obscene tit flesh. “Dumb fat ass,” Lime’s hand glided down her sister’s side, caressing her hip and outer thigh. Lime’s heart pounded as her hand began to ascend Pinkie’s leg and towards her pink-bushed snatch. Reaching Pinkie’s pussy Limestone gently ran her fingers across the velvety lips. “Stupid huff hot huff juicy pussy,” Limestone breathed as she stroked her sister’s moist marehood.

Limestone’s free hand wandered to her cock, slowly pumping its length as she rubbed her sleeping sister’s crotch. Panting as she continued to molest Pinkie Limestone shook her head and knit her brow before moving to the foot of the bed. Slowly crawling onto the mattress, as not to awaken her sister, Limestone move closer to Pinkie, pausing as her snout was just above the pink mare’s cunt. Inhaling deeply through her nose Limestone’s cock began to throb and leak precum at the pungent scent before her. The sheets under Limestone shifted and the grey mare went face first into Pinkie’s snatch, fortunately the pink mare was a heavy sleeper and only mumbled as her sister’s face was buried in her crotch.

Bolting upright Limestone panted, licking her sister’s juices from her snout the grey mare’s eyes went wide with lust as her cock throbbed painfully. Limestone’s instincts overtook her, reaching down she shuffled on her knees to position herself between Pinkie’s legs. Rubbing her cock on her sister’s crotch Limestone looked down at the sleeping mare with a lust-addled glint in her eye. Leaning back and positioning her cockhead at Pinkie’s entrance Limestone slowly pressed her hips forward, slowly burying her length into the pink mare.

“Unf,” Lime grunted as Pinkie’s dripping wet cunt gripped her thick marecock. Leaning forward Limestone leaned over her sister before pressing her face between the obscenely large tits and enjoying the mare’s scent. Grinding forward Limestone had gotten roughly half of her foot long cock into the pink mare before Pinkie started to stir. Limestone froze, half buried in her sister, as Pinkie lifted her hips slightly.

“Oh mister cupcake, give me all your frosting,” Pinkie mumbled fitfully.

Limestone wasn’t quite sure who ‘mister cupcake’ was but in all honestly she didn’t care. The grey mare started slowly fucking her sister, enjoying the moist and tight confines of her Pinkie’s marehood. “I’ll give you your frosting,” Lime whispered. Picking up speed Limestone shuffled forward again as she plunged a few more inches into the sleeping pink mare’s cunt. Reaching back the grey mare sunk her fingers into Pinkie’s flank as she continued to plow her sister. With a grunt Limestone nearly hilted herself into Pinkie and started jackhammering her cunt, feeling the blunt head of her marecock bump against Pinkie’s cervix.

“Nooooo mister Candycane I want don’t want to get off the ride,” Pinkie murmured as she locked her legs around Limestone, drawing her closer. Limestone gasped as her cockhead was forced into Pinkie’s uterus. The grey mare’s head was spinning at the nearly excruciating confines of her sister’s cervix.

“I just want you to know grunt that this is your fault,” Limestone wheezed as she continued to brutally fuck her sister. Thrusting her hips faster and faster as she felt herself reaching climax Limestone squeezed her sister in a tight embrace, burying her face in Pinkie’s chest fluff. Grinding her cock in balls deep Lime came, blowing liters of potent jizz directly into Pinkie’s womb. Grunting and heaving Limestone was forced to empty herself into her sister as Pinkie’s cervix milked every drop out of the grey mare. Pinkie’s legs relaxed and Limestone leaned back, her cock still locked inside her sister’s womb.

“Mmmmmmm, creamy creamy frosting,” Pinkie mumbled as she rubbed her cum swollen belly, drooling with a blissful expression on her face.

Limestone tried to pull herself free but to little effect. Reaching down the grey mare forcefully grabbed her cock and gave it a tug, popping it out of the pink mare’s womb before sliding it out of her sopping wet snatch. A torrent of cum lewdly spilled out of Pinkie’s marehood, seeping across the sheets as Limestone watched in awe.

“Well, like I said, you asked for it,” Limestone grunted as she stealthily climbed off the bed before wrapping herself in her towel. Leaving Pinkie to her dreams Limestone silently exited the room and walked back towards the bathroom to wash herself off. Just as she reached for the bathroom door Marble’s head poked out from an adjacent room.

“It’s nice having Pinkie back isn’t it?” Marble timidly asked with a smile.

“Yea sure, she’s alright when she’s not running her mouth,” Limestone replied before slamming the bathroom door behind her.

Marble winced at the sharp noise as Limestone disappeared. Maybe I’ll give Pinkie a visit tomorrow night, Marble thought, softly stroking her cock as she thought of the plump pink mare.

Author's Note

Again, always up for constructive criticism or feedback!