Lightning flashed and thunder crashed as Twilight Sparkle looked upon her work. Her mane was almost as wild as her amethyst eyes, her horn glowing with pale lavender light that traced her indelicate stitch-work.

Pinkie Pie lay still in front of her, great, gaudy stitches at the joints where Twilight had made repairs, tracing the incision that had been made along her barrel so that the unicorn could replace all the necessary parts. Of course, the brilliant mare had gone beyond mere repair work; an equine shaft fit to make Big Macintosh himself jealous had been fitted between Pinkie’s legs, just below her existing marehood. Wires of copper and silver had been traced from the new ‘equipment’ to the old, ensuring that Pinkie would be able to feel through both when the time came.

And, as the storm’s fury grew outside, Twilight knew that the time would come very, very soon.

She just hoped it wouldn’t be the only thing that did!

Throwing open the door to her balcony, Twilight jumped aboard the platform that her perfect creation, her Frankenpie, was laid out upon, and began to move it up and closer to the window, raving as she did.

“From that fateful day when stinking bits of slime first crawled from the sea and shouted to the cold stars, ‘I am mare!’, our greatest dread has always been the knowledge of our mortality!” As though preaching to an unseen congregation, or performing upon a stage for an audience only she could see, Twilight stood, heedless of the wind that whipped her already-unkempt mane about. “But tonight, we shall hurl the gauntlet of science into the frightful face of death itself!” Lightning flashed, a bright, blinding white that was answered by a flash of lavender light from Twilight’s own horn as she stoked the fires of the sky.

“Woo!” Pinkie giggled. “Good timing!”

Twilight jabbed Pinkie just a little roughly with a hoof, reminding her to stay in character, and the party pony was distressingly still again as rain poured down upon the platform.

“Tonight,” Twilight continued, “we shall ascend into the heavens! We shall mock the earthquake! We shall command the thunders, and penetrate into the very womb of impervious nature herself!”

Wind howled around Twilight’s head as she cast her spell, whipping her labcoat about and revealing her nude body beneath it as magical energy arced from her horn to Franken-pie’s shaft, crackling along the wires that led to Pinkie’s marehood. When the energy struck home, Pinkie’s body arched, a carnal moan of lust and life emanating from deep within her very being!

“LIFE, YOU HEAR ME?!?” Twilight roared into the storm. “GIVE MY CREATION… LIIIIIIIIFE!” She threw her hooves to the sky, magic pouring into Pinkie’s body as the mad mare of science cackled with insane glee.

Suddenly, there was a creaking behind her as the door to her bedroom opened.

“Twilight?” Spike asked, poking his head inside. “What’s… going….”

Twilight stared at Spike, her left eye twitching slightly. Spike stared back at Twilight, standing in front of her open balcony as rain and wind intruded on the normally tranquil bedroom. His eyes involuntarily found their way down from his insane-looking mother figure to Pinkie, who was strapped to the ‘platform’ (which he preferred to call ‘Twilight’s bed’) with fuzzy hoof-cuffs that were attached to the corners. She was frozen in mid-thrash, a sheepish look on her face as the metal strap-on she was wearing actually looked like it wanted to retreat into a sheath that wasn’t there.

Perhaps the most bizarre part were the black “stitches” that had clearly been drawn on Pinkie’s coat in the process of preparing for the evening’s festivities.

“Spike,” Twilight started to say, “I can –“

Spike simply turned around and walked out, closing the door behind him.

“Well, at least now I know where the good markers went,” the two mares heard him muttering faintly as he stalked down the stairs.

“Do you think he’s figured out what we do up here on Tuesday nights?” Twilight asked her marefriend, looking down at her bound form with a frown.

“Rahr,” Frankenpie moaned in response.

“I guess it it is kind of obvious,” Twilight agreed with a blush. “Should I go after him and try to explain things?”

“Rah-ah-ar,” Frankenpie shrugged.

“You’re right. I can worry about therapy bills tomorrow. Tonight... is for…” She swept a hoof back through her windswept mane, giving it an appropriately insane flourish as she finished. “Science!” She threw her head back as the thunder crashed outside, cackling again as another bolt of energy arced between her horn and Frankenpie’s “stallionhood.”

“RAHR!” Frankenpie roared, straining at her bonds. The straps around her hooves snapped (as Twilight surreptitiously unfastened them with her magic), and the monster was unleashed. Frankenpie leaned up from the platform, wrapping her forehooves around her startled creator.

“No! Down! I’m your creat-or!” Twilight let out a startled yelp as Frankenpie twisted and threw the unicorn down to the platform, standing above her, massive shaft still crackling with magical energy. The lightning flashed, reflecting off of Frankenpie’s brilliantly white, surprisingly predatory grin. Twilight’s lapcoat fell open, leaving her exposed and vulnerable to the monster she had created.

Twilight swallowed hard, looking from Frankenpie’s sparkling blue eyes, down to the shaft between them, and then back up.

“I-I-I-I’m engaged!” She stammered out excuses as Frankenpie slowly stalked closer, “A-a-and once he t-but I didn’t-it was never that ti-ah-ah-ah…!”

Meanwhile, down in the main room, Spike rolled his eyes as he finished up his evening chores. Owlowiscious flew down to his perch with an inquisitive ‘hoo?’

“Don’t ask, dude,” Spike sighed.

“AAAAAAH,” Twilight’s voice sang out from above, “sweet mystery of life, at last I’ve found yooooooou!”

“Just… don’t ask.”

Author's Note

Prompt 92: Twilight and Pinkie Experiment. It fit too well in Five Minutes for me to not include it.