Author's Note

This took WAY longer than I thought. Sorry about that, been super busy lately. And lazy. Hope y'all enjoy the smut! Next one's gonna be less smutty. I think. We'll see.

In which Twilight has some fun.

Somber Shade sighs as he lays, naked smd strapped down, to an examination table in Twilight's lab. The Purple Alicorn herself was currently checking the straps to ensure they weren't TOO tight, but that Shade wouldn't be able to break out of them either, At least not yet. She wore a long white labcoat, buttoned up only half way to show plenty of cleaveage, her mane was done up in a bun, and she wore thick frame black glasses (sans lenses). Naturally this was more than enough to get Shade hard as steel, his brave and not so little solider standing at attention, as well as throbbing for it.

"Tell me again why I'm strapped to the table? Just so I'm sure i understand the idea here." Shade asked, slightly annoyed

"It's for the game silly! I'm the brilliant mad science mare, you're the monster I've created to be the perfect stud, and once I've teased you inadvertently enough you'll break free from the table, tear my lab-coat off, then proceed to use me as a flesh-light until you're satisfied." Twilight explained in a chipper tone.

Shade nodded as he replied with; "Okay, that sounds fun and all but it's kinda elaborate, ya know? Did Rarity give you this idea?" He asked curiously.

Twilight nervously laughs before suddenly grabbing a bubbling pink potion and starts pouring it down her Boyfriend's(?) Gullet. "By the way you're gonna need this, and not those silly questions, hahahahaaa..."

The charcoal grey stallion was surprised by the sudden taste of honey, citrus fruits, and cheese but didn't question his girlfriend's (?) Intentions. He should have though. See, the potion in Somber Shades system is a prototype hybrid Lust and Berserker potion, the effects of which our favorite sexy nerd didn't really test outside of some lab mice... And their population quintupled... Oh boy.

Twilight took Shade's silence as her moment to get into character, taking a deep breath, before letting out a maniacal cackle with her hands raised to the ceiling.

"BWAHAHAHAHAHAAAA!!!! At last my creation is perfected, this once normal stallion will soon become the ultimate warrior, imperious to both physical and magical attacks, and best of all He'll be able to breed an army of equally magnificent soldiers!!! I shall call this beast... The Insatiable STUD!!!" She exposited to herself, making plenty of manic gestures to make her breasts jiggle enticingly.

What the mad doctor failed to notice was her subject's changing body, his muscles began to bulk up, straining his bonds, his eyes began to glow red, and his cock went from an impressive 11 inches in leangth to a positively astounding 16 inches! With a diameter of 5 whole inches and a half inch more in the medial ring any mare on the recieving end was sure to be utterly ruined for other stallions. With his creator the only mare in sight It's only natural that she be the first to taste the lust of the Insatiable Stud.

Twilight gasped when she turned to look at her creation, now escaping his bonds, and covered her mouth. He was.... Gorgeous! Towering over her now, rippling muscle, massive cock... It was like she made him in a lab! Okay, she technically DID do that but he turned out perfect. Well, almost perfect, she didn't plan on the glowing red eyes... Twilight nervously stepped back, realizing she may have miscalculated something in the mixture, only for her labcoat clad ass to bump into the counter. She was trapped, alone, with a suped-up stud ready to fuck a mare so far passed stupid she becomes a genius.

Shade took a heavy step closer to Twilight, his breathing heavy with power, his glowing eyes scanning the sexy mare before him. "You made me horny, Doctor, you'll love me when I'm horny." He said in a deep, smooth voice.
It was at this very moment Twilight Sparkle, Princess of Friendship, protector of Equestria, realized: She fucked up.

With surprising speed the altered stallion was upon the mad scientist, tearing open the mares labcoat to reveal her bare breasts, his large hands sinking into the soft titflesh as he groped and squeezed. Twilight whimpered and moaned in lust, her body already betraying her, as she writhed under the relentless assault. This was exactly what she needed, the absolute dominance of her enhanced lover left the alicorn soaking wet between her legs.

"Fuck, Shade, don't tease me... I need that monster cock in me now!" She whimpered as the stallion mauling her tits began biting and suckling her fat nipples.

Taking the hint Shade tore the rest of the lab coat off of Twilight and lifted her into his strong arms so he could aim his cock head dead center with the princesses dripping snatch. The enhanced stallion only took a moment to savor the anticipation before suddenly ramming Twilight down onto his obsidian shaft, the purple alicorn crying out in pure ecstatic bliss, the sheer level of stimulation triggering a mini-orgasm.

Twilight Sparkle was lost to the pleasure of being well and truly fucked to notice any prying eyes, or an audience, or even think about who might walk into the lab to find her getting fucked like a common whore by her temporarily super-stalion special somepony. For his part Shade was of one mind, with a single goal, and a rather simple one at that: Fuck Twilight stupid.

Deep and hard the smokey grey stallion thrust into the purple mare's sodden snatch, his hips smacking into her supple backside as his fat cock drove into the princesses cunt like a piston making slightly obscene squealching sounds. Not that one could hear that over the high-pitch squeals of Twilight Sparkle.

"FUCK!!! ME!!! UP!!! YOU!!! MONSTER!!!" she screams. Shade obliges, of course.

Both ponies are lost to their shared lust, gazing into each others eyes and clinging to each other for dear life, both bling and deaf to the world around them. Twilight yelps and rocks her hips harder to match Shade's rough thrusts, her inner walls gripping his cock like a velvet vice. The beastly stallion groans a deep rumble as he feels the tingle of an impending orgasm slowly bubble. His heavy balls began to churn between his legs, shaft swelling, and head flaring as it kissed the princesses cervix.

That was enough to set Twilight Sparkle into another mind-numbing orgasm, her usual restraint out the window as she let out another ear-piercing scream (nothing coherent sadly), while her pussy began to gush and grip around Somber Shade's cock. These sensations and signals trigger Shade's altered libido to go into hyperdrive, resulting in his thrusts to come faster as he pins the mare under him to the desk, hips hammering into her before suddenly he slams balls deep.

Twilight could feel the liquid heat of her lovers ejaculate suddenly flood her entire reproductive system. You think shes being hyperbolic, I know, but she's 100% literal. She can FEEL warm seed flood her womb, fallopian tubes, and ovaries. As well as over-flow up her vaginal canal before spraying out from the thick, rope like, volleys firing from Shade's baby-maker. If she weren't already pregnant Twilight was certain she'd be full of enough baby batter to impregnate all of Equestria... and possibly Saddle Arabia... and half of Zebrica.

Shade's mind was currently unavailable because his nuts were currently draining what must have been a few months worth of backup into the mare he loved. But needles to say he was on cloud nine. As was Twilight, as both anthro ponies were slowly coming down from their climaxes, the stallion on top of hero's flow was beginning to taper off after nearly a minute, and the Alicorn mare was starting to get her vision back.

After several minutes of holding each other and panting for breath both Shade and Twilight were able to think straight and disengage from each other. The stallion slowly sliding his deflating member out of the mares gaping, and oozing, vagina before he took a seat on the table he'd been strapped to. Twilight was able to sit up and give Shade a love-drunk smirk, giggling softly at how he'd gone back to normal size, mostly.

"Wow Shade, that was amazing. You really gave it to me." She mused as she examined her pussy.

"Heh... yeah... let's never inject me with wierd cocktails ever again, cuz for a while there I wasn't even thinking. Was kinda scary. Hot, but scary." Shade replied with a slightly nervous, but happy look.

The two shared a quiet moment before they were interrupted by somepony making their presence known.

"Now that you two are done playing doctor or whatever, you wanna tell us how this all started Twilight?" Came a stallions voice from across the spacious lab.

Twilight and Shade turned to see who it was and both paled at the sight before them; Shining Armor (Twilight's older brother) and his wife Princess Cadence were both standing in the doorway of the lab. Cadence was wiping away a suspicious substance from her chin and licking her lips, and clearly was clearly enjoying herself. Shining was trying to look tough, but that's kinda hard when your dick is out and slowly going flaccid.

"Lighten up Hun, I told you I felt something, now we know. Twilight is finally getting herself some and Shade is the lucky stallion, it's perfectly natural alicorn biology." Cadence said with a calming tone.

It was at this point both Shade and Twilight passed out from a mix of shock, exhaustion, and embarrassment. Leaving the Princess of Love and her Husband with nothing to do but teleport the two to Twilight's bed while they older couple sneaks off to find a lucky 3rd partner for the evening.