When Ponies Collide

Pinkie Pie skipped happily along the main thoroughfare of Ponyville. The town was buzzing with activity, and most of it was just like hers: related to the upcoming coronation of Twilight Sparkle. She was thrilled beyond measure for her friend, and she had decided that she was going to throw the best coronation party anypony had ever witnessed. “Hm…” she said aloud as she trotted along, “I’ll need lots of sugar and flour and eggs, and then I’ll need lots of yummy chocolate!”

She was on her way to the store to pick up the aforementioned items, when suddenly a hoof shot out from a dark alleyway and grabbed her. She felt herself being dragged into one of the town’s recently abandoned buildings. “Hey!” The pink pony squeaked in defiance after she had been tossed into a corner. She opened her eyes and recognized three ponies silhouetted against the dim light filtering through the boarded windows.

“Um…hi! I’m Pinkie Pie, but I’m afraid I don’t know you…or maybe I do, and I just can’t see you! Wouldn’t that be hilarious if I knew you and I couldn’t see you in this dark, kinda grungy building?! Wouldn’t that be funny?! Huh?! Wouldn’t it-wouldn’t it-wouldn’t it?!”

“Oh, my Celestia, would you shut the hell up?!” An angry, edgy voice sounded out of the shadows.

Pinkie immediately recognized it. “Limestone? Is that you?”

“Yes it is, little sister,” Limestone responded as she shifted further into the light, “and we’ve got a LOT of catching up to do.”

“We?” Pinkie asked before smiling widely, “you brought Maud and Marble, too?!”

“I sure did,” Limestone said, ushering her other sisters into the light. Maud gave the same deadpan expression that she always did, but because Pinkie knew her better than anypony else, she realized that there was a small excitement within all the boredom. Marble looked incredibly nervous, and shifted her weight around constantly. She would pick up a tentative hoof, then immediately set it down and pick up another one.

“This is SO COOL!” Pinkie shrieked as she leapt forward and hugged each of her siblings, “I’ve been wanting to see you! It’s been such a long time, and I know I don’t visit the rock farm like I should, but I’m really busy with Twilight and her life and-“

“Just shut up, little sis,” Limestone said, putting a hoof over Pinkie’s mouth, “we didn’t come here just to shoot the shit.”

“Language aside…what did you come here for?” Then, Pinkie gasped, “was it to surprise me and tell me that you’re all here to help prepare for the huge party in Canterlot?!”

“No,” Maud said plainly, “we came here to ask you for a favor.”

“Oh, and just what would that be? You want me to make you a cake? A pie? A cake MADE OF PIES?!”

“OH, FUCK, WOULD YOU SHUT UP FOR TWO SECONDS?!” Limestone yelled, “Marble’s gonna ask you on behalf of all three of us.”

Pinkie’s younger sister stepped forward and cleared her throat cutely. The pink one smiled, loving her sister more and more every second. She remembered how, after Big Mac became romantically involved with Sugar Belle, Marble had come bursting into Pinkie’s room, sobbing her eyes out. She confessed that, while the Apples and Pies had been visiting that one Hearth’s Warming, she and Big Mac had snuck off multiple times. At first, their sneaking had been innocent, but then it turned sexual. Before she knew it, they had made love three times, and she felt like they were meant for each other. But then he met Sugar Belle, and inadvertently broken her heart.

“Marble,” Pinkie asked after her sister finished clearing her airway, “is this about Big Mac?”

“No,” Marble said, “it’s about you. See, we’re sisters, right?”

“Abso-tivo-lutely!” Pinkie cried, “and you’re the best sisters a pony could ask for!”

“You just don’t get it,” Marble said, “we’ve all…done something, and we think it’s high time you joined us.”

“Oh? What haven’t I done that you’ve done?”

“Um…uh….uh…”

Limestone stepped forward and suddenly smacked Marble on the cheek. Pinkie was horrified. How in the world could her sister behave in such a manner?! “You’re such a coward, Marble!” Limestone raged, “I’ll cut to the chase! We want you to experience sex, Pinkie!”

“Sex?” Pinkie asked, “but…I’ve done that before!”

“You have?”

“Yeah, my friends and I had an orgy a few weeks ago, and I’ve had sex with Cheese Sandwich a couple of times. It’s all been AMAZING! But…” Here Pinkie took on an alluring look, “…I’m not opposed to having a little fun with all of you. I have a potion with me that might just lead us down some interesting paths. It’d be a shame to see it go to waste…”

She batted her pretty blue eyes at Limestone’s sharp green ones, and her sister began babbling incoherently. She knew Limestone had a fairly solid crush on her, and just the idea of sex was making her insides squirm. Now Pinkie had her sister right where she wanted her, and she downed the potion Starlight had given her. She felt her vagina shift into a penis, and she showed off to her siblings a bit.

Limestone’s mouth fell open, craving the large erection she saw in front of her. She stepped forward and batted at it with a cautious hoof. In response, Pinkie turned around and kissed her cheek. She felt her mane deflate and her personality change. Good, she thought, the tables have turned. Now I can mate with my sisters, and show them just how much I love them.

With that, she shoved Limestone over, and sat down on her stomach. “Before we begin, I just wanna make sure everypony’s okay with this,” she said, “I wouldn’t want to be falsely blamed for something.”

“YES! YES!” Limestone cried, “just shut up and let me suck it! It’s gorgeous!”

Before Pinkie could say anything, Limestone wrapped her lips around her new member and began sucking and slurping it down. Waves of pleasure washed over Pinkie as her sister made oral love to her. “Oh! Oh! Oh!” Pinkie cried, “that’s it! Suck it just like that! Oh…OH!” Her heartbeat quickened as she looked down beside her and saw her sister’s soft folds just lying there. She took a hoof and began massaging them. Limestone moaned in delight as she continued her sucking.

Meanwhile, Maud and Marble had begun playing with each other. They kissed deeply, and Marble quietly and gently stripped her sister of the plain body length dress she was wearing. Their lips deepened into each other as they began searching for the other sister’s vagina. Once Maud found Marble’s, she softly rubbed it and then broke the kiss. She offered the tiniest smile and dove under her sister. She began licking at Marble furiously, and Marble’s howls of ecstasy were deafening.

“Oh! Oh! Oh! Maud! Oh, fuck, that feels good!”

It turned Pinkie on greatly to hear her normally quiet sister’s cries of pleasure. Her own feelings were mounting with every smooth lick of Limestone’s tongue, and she suddenly felt her release coming on. Not yet, Pinkie said to herself, I have to make love to her. But first…what was it Rarity made me do during the orgy? Lactate? Yeah, that’s it!

With that, she yanked her faux penis out of Limestone’s mouth and went down to her nipples. She began tugging on them and biting them, trying to coax the milk out. Limestone cried out as pain and pleasure shot from her small, yet very sensitive teats, and Pinkie ate up every wonderful tone. “Cry for me, Limestone, just like all the times you used to make me cry!”

“I never made you cry!” Limestone protested.

“Like hell you didn’t!” Pinkie retorted, “now, spill your milk. Come on, baby, you can spill it for your sissy!”

“Yes…yes…” Limestone yelped as Pinkie continued biting her, “bite me…more…more…more…oh, Celestia! Oh! Oh! Oh! I’m…lactating!”

With that cry, warm, wonderful liquid spilled out from Limestone. Pinkie lapped up every last sweet drop, and then latched on and fed herself. Limestone groaned with pleasure as Pinkie sucked on her. The party planner thought that it was the sweetest thing she had ever tasted, and she drained her sister dry. When she was done, she got off and stood over Limestone. “Are you ready?” She asked, batting her eyes.

“I was fucking born ready,” Limestone growled with lust, “fuck your sister, you bitch!”

With that, Pinkie bent down and kissed Limestone. Their tongues danced as she shoved her cock deep into Limestone’s vulnerable pussy. Her sister screamed with agony and love as she felt her insides get torn in half by the one pony she wanted more than anypony else. “OH, FUCK ME, PINKIE!” She howled, “FUCK YOUR SISTER! I’M SUCH A BAD MARE! COMMIT FUCKING INCEST WITH ME!”

As Limestone’s words became dirtier, Pinkie began going faster. Her thrusts were as violent as a good size stallion’s would have been, and Limestone ate them up. Their sisters watched, intrigued by everything, and each one wanting a turn with Pinkie’s new member. But Pinkie wasn’t willing to share just yet. First, she had to finish off Limestone. She howled along with her sister as they drove each other towards climax.

Limestone shifted her weight around so Pinkie could attack different spots inside her dripping folds. Her walls had been pushed to the limit, and Pinkie loved it. She enjoyed seeing Limestone’s face twisted up in pain and pleasure. Now I know how Starlight feels whenever she fucks another mare, she thought, it’s fun knowing I’m bringing so many good feelings to someone I love so much!

With those thoughts, she drove herself all the way into her sister’s womb. Limestone screeched at the top of her lungs as she felt her dam finally give way. She shot a river of liquid onto Pinkie, and the party planner quickly pulled out, not wanting to lose her body part. She knew that, once orgasm had been achieved, the magic would fade and her erection would revert back to a vagina. She had two more sisters to have fun with. “Alright, Maud,” she said, “it’s your turn.”

Maud smirked, turned and bent down. She moved her tail aside, revealing a vagina that fairly shone from its emission. Pinkie was a little surprised. She had caught a peek at her sister’s nether regions before, but they were as deadpan as she was. How they had turned into something so magnificent was beyond her. “Um…Maud?”

“Yes, Pinkie?”

“Your vagina…it’s…well…”

“Oh, it’s not grey and boring like I am? Well, you have Mudbriar to thank for that. His nightly poundings have turned me into a regular fuck horse. Now, bang me, you bitch.”

Pinkie’s smile became ten feet wide and she mounted her sister. She shoved into her with a great amount of violence, but only received a grunt in response. She wailed away at Maud, showing absolutely no mercy and smacking her rump four or five times for good measure. But nothing seemed to elicit more than a deadpan moan or two from her sister. This is no fun! Pinkie thought, I mean, her vagina feels amazing, but Limestone was screaming her head off! Can I get ANY EMOTION HERE?!

“Oh, Maud…” Pinkie sang out, trying desperately to get Maud to come around.

“Yes?”

“I need to use the bathroom.”

“What do you need to do?”

“I’ve gotta pee really bad.”

“Just use my pussy.”

Pinkie was disappointed. She did actually have to go, and she wanted to use her sister as her living outhouse, but not having Maud beg for it created complete stagnation in her flagrant emotions. So she stopped her thrusts long enough to give Maud’s walls a good coating with her pee, and then pulled out. “You’re no fun to have sex with, Maud!”

“Just because I don’t moan and scream, doesn’t mean I’m not enjoying it. Now get your dick back in there.”

So Pinkie reapplied herself to her sister’s body and began wailing away again. Soon enough, she felt Maud’s walls begin to clench, and her sister let out a soft, low groan as she unloaded. Pinkie felt her cock swimming in the warm liquid and pulled out, not wanting to explode yet. “Alright, Marble, your turn…then I’m gonna cum on all three of you!”

She turned her violent psychopathy on her baby sister, who squirmed a bit. But morbid curiosity won, and she flipped on her stomach for her sister to mount her. Pinkie grabbed her mane roughly and pulled and yanked on it. Marble howled and asked for more as Pinkie thrust herself inside. The combination of Pinkie’s giant member and the mane pulls sent Marble’s fetish for pain into a frenzy. She felt so much of it, and she knew how incestuous and dirty their act was, that it didn’t take her long to have a rather violent orgasm. She shrieked with pleasure and yelled at Pinkie to pull out. When Pinkie didn’t, Marble turned around and ferociously bit down on her shoulder. Pinkie, needless to say, got the message and pulled out, allowing her sister to roll around on the floor in agonizing pain and wonderfully amazing ecstasy.

When that small display concluded, Pinkie turned her penis on her sisters’ faces, masturbating furiously over them. They spoke dirty words to each other, trying to drive Pinkie towards climax. “Mmm….mmm….you three are such bitches! You’re such dirty mares, to sleep with your sister!”

“Oh, Pinkie, there’s been no sleep today! Now, cum! CUM!” Limestone yelled, “let me feel your hot release all over my face!”

“Indeed,” Maud said monotonously, “I want your cum as well, and I want to lick the cum off Limestone.”

“Cum on me!” Marble begged, “please! I’m nothing! I’m just a worthless whore! Please cum on me! Put me in my place!”

“Oh…oh…oh…I’m close…yes! Yes! Yes!” Pinkie cried, “OH! OH! OH! OOOOOOOOOOOOOOOOOOOOOOOOOOOOOHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH!”

The release was gargantuan. Rivers of vaginal liquid flowed out of Pinkie’s tip as she finally went over the edge. It covered the faces of her three siblings, who immediately turned and began kissing and licking each other. To finalize their proceedings, Pinkie shared a little more urine with all three of them, which only compounded the amazing taste of her cum. When she got through peeing, her member reverted back to its vaginal state and she collapsed next to her sisters.

“That…was…amazing,” she panted.

“Indeed it was,” Maud said without a hint of emotion, even though her flanks were heaving, “we’ll have to do it again sometime.”

“Eh…when you’re stuck between a rock and a pie, sometimes a little wiggle room is all you need,” Limestone quipped.

“Mm-hmm,” Marble agreed.

The sisters all laughed and embraced before helping each other back to their hooves, doing their best to wipe away any evidence of their fun, and heading back into town as one.