Fluttershy’s shed is what she liked to consider her secret stash of… well, let us just say embarrassing implements she often subjected herself to in a vain attempt to control her rather persistent little problem that was somewhat growing on her.

However, as of right now, it had become a dungeon of wonderful blissful torture for a certain unicorn that had unfortunately awoken a sleeping beast of relentlessness.

Trapped to Fluttershy’s lack of mercy and guided into a shed of erotic horrors that would make a pony blush to the point of ruptured blood vessels in the cheeks, Rarity had found herself face down on the dirty wooden floor with her forehooves tied behind her back and her rear stuck straight up into the air, her tailing submitting to gravity’s allure to cascade down her back, mixing with her mane.

Tears wept from her eyes as she panted heavily from the hot pain searing into her ass from the six inch vibrator trembling within her rectum, the mock testicles at the base the only anchor to prevent her body from accidentally consuming it during her pleasant contractions.

But this was not the only reason why Rarity was lost in a euphoric state of rapture.

It was not the physical world that appeased her desires and had rendered her to submit to Fluttershy’s enforcement—no, far from it.

The floor to which she was forced to push her face into, was dirty.

The vibrator in her ass that was once in her mouth not moments ago, was becoming dirty.

The tongue to which hung from her mouth and was smeared with who knows what grime that was littered on the floor of the shed, was dirty!

She felt dirty and she loved EVERY minute of it.

“Ah...ahh… ahhhhh~” Rarity could barely moan, let alone speak.

She was gone.

Her eyes were glazed as her mind drifted off into a far away place even she did not quite understand where.

But one thing was for certain.

Rarity wanted more.

“Th-this may hurt a little...” Fluttershy’s whisper, saturated with a glee Rarity could not describe; that come from the lips of mare she once knew to be so innocent and kind, was in fact, somehow teasingly kind and just a touch sadistic, as Rarity felt something cold and hard press against the glistening folds of her labia.

But nothing happened.

“Do you w-want more?”

Rarity nodded the best she could, her broken groans the only reply Fluttershy was going to get.

“I… I never really understood why I bought this thing,” Fluttershy lifted her forelegs and moved to wrap them about Rarity’s waist, drawing her flank higher into the air so she could position the strap-on dildo’s tip for entry, “n-never thought it’d come in use… I-I want to hear you beg for more, Rarity… please? I-If you don’t know, I-I won’t put it in you… y-you like pain, right? Well… it’s really big and I am not quite sure it’s going to fit…”

“P-p-plah-leazzee…”

“Hm?” Fluttershy teased.

“F-f-fuck m-m-me,” Rarity slid her vacant eyes back along the length of her body, trembling at the mere sight of Fluttershy towering over her, “m-missttresss…”

“Hehe,” Fluttershy blushed, her body quaking as a mini-orgasm washed over her momentarily at the mere concept of Rarity’s submission to her dominance, “m-maybe Iron Will was kinda right…”

The shy mare leaned a touch forward, pushing the tip into Rarity’s vagina, attaining an immediate reaction from the mare below by means of an elegant yelp that transformed into a throaty groan, their eyes entrapped by each other’s gaze.

“D-don’t be shy… look them in the eye.”

Violently and with no thought to how it would feel, five inches of the nine inch strap-on ploughed into Rarity, causing the mare to buck her rear legs, her face contorted into agony as she panted and screamed.

Fluttershy, with her forehooves wrapped purposefully around Rarity’s waist, lifted the mare’s flank so that Rarity’s rear legs simply flailed in the air, unable to escape as Fluttershy drew her hips back and slammed them forward in an awkward rhythm.

“F-flutshhaaaah!”

Longing to push off of the ground and to remove her face from the dirt, Rarity struggled with her bonds but to no avail.

No matter how hard she tried, she only grew more tired.

Her best friend was brually fucking her with a strap-on dildo while a vibrator was trembling her innards like nothing she had ever experienced before and best of all?

She could not stop it.

Rarity was completely helpless and it felt breathtaking.

Despite Fluttershy’s lack of physical stimuli she herself was lost within her own rapture.

Her condition, accelerated by the sheer thrill of what she was doing was causing the mare to experience wave after continued wave of orgasm beyond her control.

Each thrust of her hips was as desperate as the last, her hot and heavy breaths wisping past an open mouth that giggled and moaned, her coat covered in a light sheen of sweat as her efforts begun to take its toll upon her.

“St-stallions m-make this… l-look so-ahhn~easy!”

“Pl-plahleaaze, Flf-lut-shy, ah! I-it hurts!”

That it was.

The brutality of Fluttershy’s thrusts with such a thick implement forcing its way in and out of Rarity’s vagina had caused it grow red, raw and somewhat a little swollen, increasing its sensitivity and thusly at the same time, decreasing Rarity’s capability to bear with the pain for much longer.

“Th-then, release, R-Rarity,” Fluttershy looked to Rarity’s rump and with a single leg holding Rarity’s flank up, she drew back her hoof and slapped as hard as she could against Rarity’s flank, bruising where it has struck in its sickening slap that drowned out their collective moans.

Rarity’s eyes widened as she yelped, her rear legs locking up as her mouth flew open wide with an earsplitting screech as Fluttershy struck mercilessly once again against the bruised area.

The amalgamation of senses had overridden Rarity’s body once and for all, forcing her orgasm out far harder than she had ever experienced before.

Rarity tried to screaming, but nothing came out of her wide gaping mouth save the rush of air that escaped her lungs all at once. Then with a desperate gulp of air, she repeated the action until she could breathe once more, her body falling limp moments later, succumbing to exhaustion.

Fluttershy released her, giggling as she drew back and allowed the strap-on dildo to slip out of Rarity’s vagina, a flood of fluid leaking out of the mare as Fluttershy allowed Rarity's body to slump onto the floor heavily.

Leaning her head down, Fluttershy gripped the vibrator’s ballsack and pulled the buzzing instrument from Rarity’s rectum, the dry and lubricated state of its penetration causing a minor prolapse to protrude from Rarity’s anus, to which caused Fluttershy to blink as a trickle of blood dribbled from the orifice.

“Um… oh my… is it supposed to do that?”

Author's Note

People seemed upset that my Futalestia fic did not have anal.

HERE'S SOME PROLAPSE, INSTEAD.

Right.

Excuse me while I go throw up somewhere.