Polyamory (Speedclop)

Prompt

Sometimes ponies like to inject a little fantasy into the bedroom. Whether pretending to be fictional characters, famous celebrities, or even each other, ponies like to get dressed up. You've got one day to write one hour ~~about~~:

Ponies Roleplaying

Story

Rainbow Dash looked at the ball of scrunched up paper between her hooves. The text Screw [illegible] silly [Check] was visible on one side. She looked across the candlelit room at the purple unicorn sitting at the far side. Her muzzle was buried in a book, like normal. Unlike normal, that book came from Twilight's adult section.

“Watcha reading, egghead?” Dash asked, throwing the paper on a wide arc towards the distracted mare.

“Oh, it's-” Twilight stopped mid-sentence as the ball impaled itself on her horn. Rainbow Dash burst out laughing as Twilight's expression slowly shifted from one of genuine enthusiasm to a mix of irritation and amusement. Rainbow Dash was a good shot, she knew she was, but there were some things she could never compete with Twilight on. A fraction of an instant later, Dash felt four hooves slam into her back, knocking her to the floor and pinning her there. The scrunched up to-do list dropped in front of her eyes and rolled a few feet away as Twilight cemented her hold on the pegasus, carefully drawing runes and glyphs at the end of each of her hooves to hold her still and bind her will. “It's a book on ancient Equestrian mating rituals,” Twilight whispered, leaning close to Dash's ear and whispering. “I was thinking we could try some.” Her sentence was punctuated with some light slaps to Dash's flank, prompting quiet squeaks and grunts from the now tightly-held pegasus.

“Anything new in there?” Dash gasped back, feeling the tip of Twilight's magic running over her body. “You've kept me so bored tonight, Twilight, I- ah- I need this.”

Twilight sighed. “Not really, the ancient Equestrians weren't that imaginative. Let's see, there's a ritual involving some knives and a- oh dear, that's a sacrifice. Oh! How about this one, it has snakes!”

“Do you have any snakes?”

“Well, no, but I'm sure we could borrow some from Fluttershy.”

“Aren't they dangerous?”

“Well yes, that's the point. It sounds very exciting. Look, there are even illustrations! One pony gets tied down—we've already done that—then the room is slowly filled with snakes!”

Dash paused to think about it. “Twi, how the hay is that meant to get me off?”

“I haven't read that far,” Twilight said, brushing away Dash's concerns, “but it'd be something new, wouldn't it? Come on, Dash, we need something new. I'm bored of just rutting you to sleep!”

“Yeah, I know the feeling,” Dash replied. Her limbs were still spread out and her tail still jutted into the air, but her tone was one of disappointment. “Man, I was really hoping for something fun. I guess we could borrow Pinkie's gags again, that could be fun.”

“Nah, I'm sick of them. I dunno what else we could do with them.”

“Twilight,” Dash said, her voice suddenly tinged with fear. “What if we've finally done everything? What if there isn't anything new left? I mean, we've done it on the bed, in mid air, on the moon, in that weird magical pocket dimension thing of yours, in Canterlot gardens, under Celestia's bed while she slept-”

“Yes, Dash, I get it.”

“-and I never thought we'd top cumming during a Sonic Rainboom, but that time in the Everfree Forest with all those plants? Man, why can't we have something like that again? I think we've done everything, Twi.”

Twilight made a disgruntled grunt. “We can't have. Maybe we should invite somepony else?”

“Then it wouldn't be just us anymore,” Dash said. “You know that breaks the rules. Saturdays are our night, just us.”

An idea suddenly flew into Twilight's head, smashing past her usual barriers of 'No, that's stupid' and 'Is Pinkie writing my mind again?'. “No, Dash! That's it!” she said. “We'll have to be not us!”

“Huh?”

“We've never done it as not us!”

Dash pondered. “What, like… I'll call myself Chromatic Smash and then we rut?”

Twilight twitched. “Let's leave your Ponies and Parties character out of this, Dash. Let's do something… nopony could ever find out about!”

“Something Rarity'd faint if she even suspected?”

“Exactly!”

“Well, I have always wanted to do your brother.”

“Dash!” Twilight exclaimed. “I can't believe you. You spent ages with him at the wedding, why didn't you make a move?”

“He's married!”

“So?”

“I know we're open about it, but he might not be!”

“Pff.” Twilight rolled her eyes and shone her horn. A thin streak of light appeared to the side of the two bored and horny ponies. It opened, taking the two sides of the world around it with it as if Twilight was cracking reality itself. As it happened, she was. “Celestia would be so mad at me if she knew about this.” Twilight giggled and pulled a tiara from the void, before plopping it down on Dash's head. Immediately, the frazzled and unkempt mane of the rainbow coloured mare straightened and curled, taking on the appearance of somebody much classier and more refined.

“Woah-” Dash stopped, realising her voice was higher and less prone to cracking. Her accent was different too, she'd lost that east Cloudsdale twang and replaced it with the smooth tones of an upper Canterlotion. “Oh my, Twilight!” she said, putting on her classiest vocabulary to match her well-kept coat. “What have you done to me?”

“A simple transformation spell, tied to the item I just created,” Twilight explained. She pulled another few things out—a set of armour, it looked like. “If we're going to pretend to be somepony else, we may as well do it properly.”

“Gosh, darling. Your spells really do impress me sometimes.”

Twilight pulled a helmet around her head and closed her eyes, feeling the magic overtake her. Dash wouldn't have been able to feel it, but she could. The enchantment ran through her body, energising every cell and adding another layer of perception on top of her skin. She felt the speech centres of her brain twist to accommodate the new knowledge of her new accent, and moved her hindlegs apart a little to accommodate her new anatomy. “Heh, it does work!” Twilight said, in a voice much lower than her own. A male voice. Her brother's male voice. “Still think I'm sexy, Dash? Or should I say, Cadence?”

Dash licked her lips. “Darling, I married you, didn't I?”

“Yes, and you even turned down my sister's advances, even though she's really really nice and—if I do say so myself—fantastic in bed.”

“Twi, would your brother ever actually say that?” Dash said, dropping down to her usual higher pitched tones.

“No, of course not!” Twilight replied in her natural voice. “I'd never have… relations with my brother!”

“So, come on, stay in character! Honestly, we have to get you playing Ponies and Parties more often.” Dash leant down until her head was pressed against the floor. The curls of her mane brushed against the dirt and started to unravel, and while both of them knew the mane wasn't real, seeing it start to come apart as a result of their lust was still exciting. “So uh, how transformy are these spells?”

“I'm anatomically accurate, if you're asking. Assuming my brother is on the far right of the bell curve, anyway, I haven't checked.”

“Oh, he is.”

“Excellent.” Twilight switched back to her brother's voice. “Bend over, love.”

“Y'know I don't actually need to be in character for this, I'm fine with screwing your brother myself.”

“Shut up, Dash.”

Rainbow Dash sighed, rolled her eyes, and started to speak in Cadence's voice once more. “Oh, darling, you must have had such a difficult day! Why don't you just lie down and let wifey make it all better?”

“Only if you promise to let me at that sweet ass of yours later, love,” Twilight replied.

Dash winked and pushed Twilight over. Her metal armour clinked against the floor as she toppled, landing on her back and baring all for Dash to see. Between Twilight's purple haunches was a quickly stiffening penis that, as she had said, was far on the right side of any bell curve. By the time it was semi-hard, it already seemed to tower above Dash's head. She squeaked and opened her mouth, kissing the side from top to bottom to speed its growth. “Mmm, it tastes like a Sparkle.”

“Gnh… hurry up, Da- Candyass, I don't have all night. I have guard duties and stuff that'll keep me from even sending a letter to my sister for years because I'm so-” Twilight was cut off as Dash's lips met the tip of her newfound horsecock. They parted only as much as was absolutely necessary to force the meaty shaft through, forcing it through for Dash to run her tongue over and take in both the taste and sensation of taking both Sparkles at once. Metaphorically. “Oh, Celestia Dash that feels-”

“Shut up, Shiny,” Dash said. Her voice was muffled by the thick and pulsing cock in her mouth, but the point still stood. As did other things. In an attempt to keep Twilight's silence active, Dash began to suck, bobbing her head up and down over the large stallionhood and grinning as her mane began to untangle, returning to something closer to her natural style. She started to moan, pushing a forehoof under herself to fiddle her nethers and sate her body's burning desire.

“Oh, Dash, I'm gonna- I'm gonna-” Twilight groaned as her body gave in and thrust her into orgasm. A flood of true-to-life cum shot down Dash's throat, causing her to leap back in surprise. Unfortunately for her, a second load followed, splattering against her face, mane, and tiara. Twilight collapsed, lying back against the floor panting heavily. “That- Celestia, Dash, that was amazing.”

“Seriously? You lasted, like, twenty seconds. If that. My hoof is barely even wet.”

“Don't- don't blame me… this anatomy… should be accurate.”

“Man, poor Cadence. I bet she's regretting turning you down now. Whatever, come on, Twi, get up.”

“Too tired, time… sleep.”

Dash rolled her eyes. “Pff, stallions.” With a single arm she pulled Twilight to her hooves, keeping her steady until she could stand by herself, and then leant down before her. Her cum-splattered face touched the floor, and her unfortunately unmarked “Candyass” stuck into the air. “You made me promise, Twi. Now come on, rut me.”

“Pf, like my brother could ever keep his promises. A letter a week, he said, we'd never lose touch, he said. Yeah, look what happened!”

“Twilight! Rut me.”

“Oh, whoops, sorry.” Twilight shakily walked forward, using what little time she had to cast a variety of her favourite spells. Endurance and rejuvenation for her, and the most powerful Weakness to Orgasm spell she had on Dash. Maybe—just maybe—that would counteract her brother's short fuse. She jumped, mounting Dash's rear in one smooth motion. With a touch of magic, aligning herself was a trivial task and she soon felt the primal urge to thrust as the head of her length pressed into Dash's puffy and slick lower lips. She pushed, slowly entering and travelling deeper into her companion. “Ah… ah!” she moaned, feeling Dash's heartbeat send lightning strikes of pleasure through her. Before she'd managed to insert herself fully, the constant battering from Dash's body proved too much, even with her endurance spells, and Twilight came.

“Ooooh,” Dash groaned, feeling the hot cum spew inside of her. “Oh that feels great,” she said, finished with a happy sigh. “Celestia yes, more of that!”

Twilight pulled out and fell to the side, exhausted.

“Oh come on!”