Twilight sighed, staring at the blank piece of parchment in front of her. For the fiftieth time that hour, she pressed the quill tip to the ever-growing inkblot, her mind trying to figure out what to put on paper.
Her report on the effect of dark magic during the Shadow War wasn't due for a whole month, but Twilight wanted to get this finished long before then. Even a plan was hard to come up with. Should she start on the physical effects on the soldiers, where records were few and far between, or on the landscape, or...?
Her head hit the desk hard.
Her concentration wasn't being helped by the slowly-increasing sexual tension she had been having recently. She couldn't remember when it started, but a few weeks back she suddenly became more easily aroused. Perhaps it was an anomaly in her hormones, or a simple lack of any form of release for the past few weeks.
She lifted her head up and stared at her paper again. "Ugh..."
Try as she might, her mind just couldn't focus on her task. Her head fell into her hands, her fingers grasping at her violet hair, staring at the parchment but not really seeing it. Every attempt to concentrate, every shift in her pose, didn't bring her any closer to her goal.
The panties she was wearing brushed against her nethers, a spike of pleasure running up her spine, and she let out a breath she didn't know she was keeping in.
She paused, her brain's gears grinding into action, drumming her fingers on the table. "Hang on a second..."
She parted her legs and looked down, lifting her skirt up with a flick of magic from the crystal on her forehead. Looking at the slightly-transparent underwear, the starting signs of arousal were already making themselves present, signs like the slight dampness.
"Maybe this is the key..." Her magic flickered across her panties, and she shivered reflexively at the jolt.
She looked around behind her, biting her lip by instinct, locking her bedroom door and making sure no-one could come in. Then, she turned back to the desk, and closed her eyes as her magic slowly stroked her inner thigh, working her arousal up some more.
After a few moments of stroking her leg, a second aura pulled her panties away, just as the first reached her slit. She started rubbing her outer lips, her body shuddering as she did, a vague tingling from the sparkles in the magic accompanying the pressure. The aura disappeared and reappeared to gently tug at her inner lips, eliciting a gasp from the caster which was followed by a slow, quiet moan. It almost felt like she was being touched by someone else's hands.
As one of her hands moved up to her chest, her magic flicked across her slit before enveloping it and pulsing against it. She moaned again, lifting her shirt up and groping her breast with the opposite hand as her magic continued to rub against her sensitive spot.
Her magic stopped pulsing and instead worked its way to her vagina, prodding the entrance as her hand pinched her nipple. At the same time, another flash of magic proceeded to prod under her entrance, instead focussing on her asshole. The three-way stimulation caused her to gasp and moan, lean back and push her hips forward to allow her magic better access.
Her magic slowly pushed itself into her two holes, fluids from her slit dripping onto the chair underneath. Her breathing became heavy as she paused to adjust to the girth of her magic inside her, before it slowly pulled back until it was fully out, then gently back in, building up a rhythm. Each thrust was accompanied by a moan which only became louder the faster her magic went, sending little spatters of liquid to the oak floor below.
As she hit a decent rhythm her magic flared up again, and two new auras appeared. One focussed its attention on her neglected breast, while the other slowly stroked itself against her clit again, sending a jolt of pleasure through her body and making one of her legs jerk involuntarily, smacking painlessly into the table. Her free arm moved around, trying to find something to touch, something to grasp, but it couldn't find anything.
Her thrusting grew faster and faster, her rubbing becoming more vigorous, approaching slowly to her limit. Her working arm moved aside to be instantly replaced by magic, and it instead moved to clutch her head, feeling somewhat light-headed.
Then, she stopped. Her magic froze in place, her arms moving at a snail's pace. The bright aura around the crystal burst into a spiralled cone of magic, just as the magic shapes inside her holes grew to a larger size, the other auras brightening around their locations and becoming finer.
Her speed returned just as suddenly as it had stopped, and in a few seconds sped up further. Her hands grasped her chair as she moaned louder and louder, her mind not even in the real world but instead focussed solely on her own pleasure.
Her moans turned into a long scream of ecstasy as she finally hit her limit, her slit not just leaking, but squirting, girlcum out, just as her magic shorted out completely and the spiral emanating from her horn dispersing back into nothing. Her voice caught in her throat in the middle of a second squirt, her entire body stiffening.
After a second her body went limp and her breathing returned, heavy with exhaustion.
"Twilight!" Spike's voice called out to her from behind her door, followed by a shaking of it. "Twilight, are you alright? I heard screaming and-"
"I'm fine..." Twilight panted a reply, her head rolling onto her shoulder in an instinctive attempt to look at him, despite him being behind the door.. "Relax."
Spike was silent for a moment. "You sure? Your magic sounded like it was going haywire."
"Yes... In fact, I think I'm better than fine..."
Spike remained silent for a lot longer this time. "Okie dokie. Oh, by the way, Pinkie's here to see you."
"Tell her... Tell her I'll be out in just a second." Twilight replied.
"Will do." Spike's footfalls faded away, his muffled voice calling out to whom she assumed was Pinkie Pie.
Twilight groaned and pushed herself forwards, her arms flopping onto her desk and into a warm, wet puddle of her cum. She froze, then looked over her desk.
There was fluid everywhere. Some of it had gotten onto spare rolls of parchment, but most was on the currently open roll. Some had even gotten into her inkpot, if the slow trickle of clear fluid down its side was any indication.
"Well." Twilight looked at the strands on her now-raised arm that were still anchored to the table. "Darn, that's a waste."
Author's Note
While I don't have permission to use the picture as a cover image, here's a link to the picture so you can tell where I got my idea from: https://derpibooru.org/203311?scope=scpe492d0d4fb704cd6bbecd36e5d36e5c4f886864c6