Twilight Sparkle was alone.

Metaphorically, of course. She still had her friends, her assistant, as well as her eternal teacher and sun Goddess. Almost all of Ponyville liked Twilight; she was smart, attractive, and who doesn't like a sexy librarian? Any stallion, or mare of the right persuasion (she didn't mind) would count themselves lucky to know her. But that was the problem.

No, today, Twilight was alone because she wanted to be. She had locked herself away in her library, of her own free will. She needed to keep to herself, or risk the consequences, and these were consequences the young student couldn't bear to have. Not yet.

She, like Fluttershy, was in heat. And Twilight, unlike Fluttershy, had realized this was no normal heat she was in. This was much worse.

Normally if she was in heat, she could take care of herself with a nice clop, and be done with it. Or she would at least feel better about it. That wasn't working this time; she had been clopping furiously nearly all day, and the itch wouldn't stop. She tried everything she could think of, and was it ever hard to think.

She couldn't think. Truly, this was the worst fate she could imagine with her heat-addled mind. She had already lost a day of her studies to this, how much longer did she stand to lose? Was she losing her mind? All she could concentrate on was the ever-growing heat between her legs, travelling up her spine, and spreading across her body.

Twilight was a mess, and that was an understatement. Her mane was a tangle, her body was a sweaty mess of lathery pony sweat, and her tail had it worst, it was soaked in her own fluids. She absolutely stank of mare heat and her own musk; nopony could ever mistake her condition for anything but exactly what it was.

She would have to beat this thing alone, while it would certainly cure her of it, she knew all too well the consequences of following her instincts and bedding a stallion in her heat. As every young filly learns in school, if a stallion sleeps with a mare in heat, she will get pregnant. This was a certainty, given how the male's penis flares before orgasm, giving no opportunity to 'pull out'. On the bright side, mares not in heat, have an extremely low chance of pregnancy, but this was cold comfort to Twilight right now. All it meant was she absolutely needed to take care of it alone, or the consequences would be dire. She could just see the tabloid headlines if she got pregnant with a random stallion's foal:

"THE BUN IN HARMONY'S OVEN"
"What Magic does this student have baking?"

Suffice to say, it would destroy her reputation, and her life, forever. It would be worse than ten Foal Free Presses, combined. The thought alone made her shudder.

She was silently grateful Spike was not here to see her, and to give her absolute privacy. Thank Celestia for small miracles; Spike has been whisked away to Canterlot for what Pinkie Pie had called a "Lampshade Hanging". She assumed this was some type of party she was unfamiliar with, given Pinkie's knowledge of it. And why Spike was invited, out of everypony, she thought was odd. However, she also knew better than to question Pinkie about... anything. To do so was madness. And right now, it was the last of her concerns. All she really needed to know, was he was in the good hands of the princesses, and that he would be gone, hopefully, long enough to take care of her... problems.

So she had spent the day alone in the library. Her heat was nothing new, it came around once a year, not always at the same time, but it always came. So she tried to beat it with a good clop, that way she could get on with her business. When that didn't work, she tried harder, clopping herself into a frenzy, until she came, rather messily, all over her sheets.

For a short time, that seemed to do the trick, but as she started to return to her normal routine, she realized the tingling was coming back, fast. She tried researching herbal remedies, but she couldn't keep her hooves off of herself. One magically summoned phallus later, she tried that again, with a clearer mind. All she could find were some herbal calming teas, which she doubted the efficiency of, but she brewed up an extra strong batch of several of them, and drank them all. Just to be sure. It was a shame she couldn't go see Zecora for one of her remedies in her state, but she would need to keep her in mind, just in case this was some kind of bizarre magical affliction, She doubted it, but a pony never knew.

Whether or not they would work, the awful taste had certainly been distracting for a few minutes. It was a good thing she had lots of practice with exotic teas during her time with Celestia. She never was quite too sure how the Goddess managed to drink some of them and keep a straight face. Thousands of years of practice, she assumed.

Right then, an idea hit her. She would burn this thing out, like she would burn out a cold, with practical application of everything she could think of, all at once. She poured her remaining tea into an extra large mug, usually reserved for late-night study sessions and trotted back up into her bedroom. Twilight was determined to beat this thing, with however much force it took.

For the nth time today, she laid down onto her bed, which was getting to be quite a mess. She made a mental note to clean her sheets when this was done. She sipped some more of the tea, before remembering how awful it tasted. Maybe later.

"What will I do, that I haven't tried yet?", Twilight said to herself, as she began to gently rub her hooves against her sex, which was already wet, and in fact, never stopped being ready all day today. Her thoughts went back to Celestia, her teacher, a Goddess, the epitome of Equestrian beauty, and no small part in shaping a younger Twilight's sexuality. One couldn't spend their adolescent years around one so beautiful, and not find themselves attracted to her, mare or not.

This was a start. Her fantasies turned toward her Goddess, whom Twilight would worship the very ground she walked upon. More of her wetness crept down her folds and into her ruined tail. She needed more, still, she thought to herself. Hooves simply weren't enough. Magic was normally the next step, but that still wasn't enough. She didn't keep "toys", so she needed to use something more personal. She had just the thing.

Reaching into a her closet with her magic, Twilight found an old box of things she kept from her Canterlot days, spent with the princess. Opening the box, she pulled out what she was looking for with her mind's eye. Out from the box, she levitated a small white pillow emblazoned with a single, yellow sun, which she brought over to herself.

This was a pillow from Celestia's private chambers, where she slept, and where few ponies, Twilight herself included, have been into. Magically preserved, it even still smelled like her. She was given the pillow, as a younger filly, after a restless night when the sun Goddess comforted her through the night, allowing Twilight to sleep with her. She was allowed to keep it to help her sleep, and to remind her, Celestia always loved her.

Twilight brought the pillow to her muzzle, deeply taking in her enchanting scent. Yes, this would do nicely, she thought as she let out a quiet nicker. Her fantasies taking over now, she clopped furiously, grinding her thighs together, her musky lubrication dripping down her backside. She was in bed with the most beautiful mare Equestria had ever seen, the object of her desire. Thousands of poems had been written, ballads had been sung, by artists centuries over, who had been enchanted by Celestia's beauty, but could never reciprocate their love.

Twilight was rutting her bed with wild abandon, spreading her juices across the sheets. Wanting more of her princess, she took in the scent of the pillow one last time, taking it all in, before throwing the pillow underneath her hips, and grinding herself into it. Lost in her lust, she spread her musk all over the pillow, mixing her scent with the princess's, defiling the precious object forever. She didn't care, she no longer needed the pillow to sleep anymore, it was now hers to do with as she wished, and she needed this, right now.

Thrusting herself onto her princess, she felt the hot prickling sensation of her heat spread up her back, and across her body. The whole room smelled of her musk, and the magical scent of her princess. Her fur stood on its ends as the sensations spread across the rest of her body, building towards a crescendo that was getting ever nearer, but remained just out of reach, still.

It was then, that the tea in her bladder made itself known. Dandelion tea is a diuretic, after all. It doesn't take much volume to make you feel full when you are wildly bucking a pillow, grinding your entire crotch against it, leaving little room for a bladder.

In her lust, Twilight didn't care for anything getting in the way of her orgasm. An orgasm that was necessary to clear her heat and return to her studies, at that. She was glad the princess didn't spy on her little ponies (she hoped), because what she was about to do might be considered heresy to some ponies. She needed to pee, but she wasn't about to stop humping. She needed this, the princess would surely understand. As for the mess, she could always clean it up with magic; being the element of magic has its benefits.

Not able to over think the situation with her clouded senses, Twilight let it all out. She stopped rutting the pillow for a second as she started to relieve herself onto it. A quiet hissing sound was heard, and she felt a warm wetness unlike no other filling beneath her. It felt wonderful. Not wanting to let a good thing go to waste, she continued rutting the pillow again; still peeing, it was now splashing around her hind legs, soaking herself and her bed.

Mixing her juices and her urine together into a slick mess proved to be a boon, because her rubbing had started to chafe a bit, and some extra moisture just made it feel more like the real thing. Now instead of 'just' rutting Celestia, she was also performing depraved sex acts on her; in her mind's eye, she was defiling the princess with her piss, while bucking the tar out of her. The bed was creaking and groaning as the maddened unicorn rode it, even managing to move it slightly with her most furious of thrusts.

Everything felt good, everything about what she was doing was warm, wet, and fulfilling. Her pleasure completely overtaking her, her muscles clenched wildly, powerful shivers covering her body, the rest of her body going into overdrive as her most powerful orgasm yet crept up on her with a bang. Her horn glowed softly, as sparks of light filled her vision, and her back arched as her muscles completely locked up, and she exhaled into a loud, feral whinnying sound as she came like she never did before, finally dropping to the bed in exhaustion, gasping for air.

When she finally regained her senses, she awoke in a wet bed of her own juices, urine, and shame. Her whole bed smelled like a restroom, although she didn't find it totally disagreeable. She also noticed something else: her mind finally felt clear!

Twilight rolled out of her bed and immediately set to levitating the bedspread off of her bed, separating it into its multiple components: sheets, blankets, pillows... her special pillow, now ruined. This last one she frowned at, but sacrifices had to be made. Her horn glowing brightly, she concentrated on each part of the spread, further separating each sopping wet part from her fluids she had sprayed all over them. She did this for each part, including the pillow, gathering her mess into a single bubble, before setting down each part of the bed into its proper places, now magically dry cleaned.

Somewhat curious now, she levitated a single drop of her combined marecum and pee over to herself and tasted it.

It had gone cold, but it was not at all what she expected. She had expected something saltier, but what she got instead was a notable bitterness, with a hint of tangyness underlying it. So this is what she tasted like, she thought. This would require further... experiments, already planning to have more fun in the future. Her curiosity now satisfied, she concentrated on her bubble of mess, as it dissipated with a light flash, and a short sparkle of magic.

Now she just needed to clean herself. She had already began to trot to her bathroom, the energy in her step making her afterglow evident. A hot shower was in order, and she needed time to think about this.

Stepping into her shower, she was already deep in thought.

She had read about mares urinating for a stallion to signal their readiness. It wasn't something that was always done, or spoken of publicly, but it was a natural, instinctual thing for ponies to do. It was very old-fashioned, sure, but it was a normal kink for a mare or stallion to have. Thinking about that made her feel batter about possible new fetish. After all, it helped her to a powerful orgasm, maybe there was something to this new... 'thing' of hers? She was certain she would have to try this again.

The hot water spraying over her body washed the day's stress and ministrations off of her, and she never felt better. Finally pushing the days events from her mind, she decided she wouldn't let the day go to waste, and she would spend the remaining evening with one of her friends: but who?

Rarity and Pinkie were closest, but it was prime business season for Rarity, with all of the spring balls and galas, she was expected to meet extra customer demands. Twilight didn't want to impose on her. Pinkie, on the other hand, would be free, but she was far too tired to try and keep up with her right now. Applejack was also busy tending to the first apple crop of the year, and Twi hardly wanted to spend the rest of the day bucking apples. Rainbow Dash was notoriously hard to find, either zipping about someplace, or napping in a cloud somewhere. So that left Fluttershy, which actually, was a perfect fit. Nothing was more relaxing than an evening with Fluttershy, she decided.

Twilight stepped out of her shower, dried herself off, neatened up her appearance, and powered up a spell to take her right to Fluttershy.

She disappeared with a flash, and found herself, not in front of Fluttershy's cottage, which is what usually happened, but instead in the middle of an unfamiliar stretch of woods.

Worried, she called out loudly, "FLUTTERSHY!", as she walked forward into the woods.

Peering through the bushes, she found her friend, nestled against an old oak tree.

"Fluttershy! There you are, I wasn't sure where you had gone-- OMIGOSH!", Twilight yelped in surprise was she took in the scene before her.

Her quiet pegasus friend, was obviously in heat too, and had just clopped herself silly, just as Twilight had done. Whats more, Twi had just startled her overly shy friend into fainting. Poor Fluttershy. She didn't mean to surprise her quite like this!

Twi took a moment to gather her wit, she could fix this. She took a deep breath to calm herself, and something smelled... off.

Was that... the smell of pee?

Author's Note

We're starting to have some resemblance of a plot now. This is going places, I promise!

As always, let me know what you think, or even if you just catch a mistake. I won't mind, I promise!

I don't have an editor or proofreader, after all. I do all that myself. Not the most efficient system, I might add.