Author's Note

Ugh... smut is weird to write.

Regardless, enjoy.

An Ache

I shifted slightly, adjusting my stance as I spoke with Twilight. As we stood beside the Crystal Mirror, she went on about recent developments in Canterlot and the surrounding area, mentioning something about Spike and Rarity, but my mind was elsewhere. I fought the desire to trot outside and pounce the first stallion unlucky enough to find himself within my grasp. I had a boyfriend, for Celestia's sake.

Still, the mental battle made my distraction obvious, and Twilight stomped the ground, the clop of hoof on stone bringing me back to reality.

"Sunset!" Twilight shouted, annoyance clearly plastered on her face. She scanned my own, looking for a sign of focus. "Do you remember what we're talking about?"

I gave a sheepish smile. "Of course. We were discussing... Spike and Rarity!"

"That was like five minutes ago."

"Oh, really? Wow, time flies fast!"

Twilight groaned. Suddenly, the door to our room opened, bringing in a pair of guards. Under all that shiny armor, I could still tell they were stallions, making my legs wobble. Ever so slightly, my tail jerked up, catching my friend's attention.

"Your Majesty."

"Make it quick."

"Princess Cadance has requested your presence." His mouth sat agape for a second as he considered his words. "She will be meeting with griffons, and has asked for help with her filly."

"Ah, Flurry Heart. Very well, I'll be over soon."

With a bow of their heads, they retreated, shutting the door behind them. I involuntarily let out a sigh, surprised by the breath I had been holding in. Despite my struggle, though, I had managed to catch enough of the conversation. "Flurry Heart?"

"My niece." Glancing over at the portal behind me, her expression turned sympathetic. "Sorry we can't talk much longer," her gaze flickered over to my behind, eyes glimmering with amusement, "though I think it's for the best we meet in a week or so."

Deeply embarrassed, I looked away, heat flooding my cheeks. "Sounds good, Twilight." We approached the Crystal Mirror, and through it, I could see the grounds of Canterlot High School. It hadn't been that long since classes ended for the day, so groups of students were still leaving. I spotted Rainbow Dash and Scootaloo standing together, likely conversing about the latest soccer news. Beside them, Sweetie Belle wrapped up her conversation with Applebloom as Rarity took her sister's hand and started heading towards the parking lot. Finally, I stepped up the stairs, sticking a hoof into the portal, watching it disappear through the surface. I turned back to smile at Twilight. "See you soon."

"Try not to get into any trouble."

Wincing at the tease, I didn't bother pondering what she was referring to, completely walking through the mirror to CHS. Standing up straight, I glanced over at the girls still nearby, who had turned to face me at my appearance. My rainbow-haired friend gave friendly nod, and the two remaining Crusaders waved shyly in tandem.

"Hey, Sunset! Visiting the other Twilight?"

Shrugging, I opened my mouth to respond, but a small, unpleasant ache began to form. It grew, taking my attention. It The feeling was increasingly noticeable, edging into unbearable. My thighs shuffled together, trying to scratch at an unreachable itch. A bead of sweat began to form on my temple, and it took an immense amount of willpower to ignore the growing discomfort that begged for me to rip my stuffy, constraining clothes off. It was as if the estrus of my pony form hadn't transformed alongside my body... and oh, Celestia, it was maddening!

Vision returning to my peers, I noticed their confused stares, but I attempted to play it off, exhaling sharply. "Yeah," I could barely squeak out a response, "pretty much."

Okay, it wasn't a good attempt, but it was an attempt nonetheless.

"Are you alright?" The orange girl asked, concern plastered across her face.

I ran a hand through my hair, trying not to increase my panic at the slickness of sweat now coating each finger. Dropping it back to my side, I quickly swiped at my skirt, but the reflective sheen of liquid being wiped on the fabric only proved to them that something was wrong.

Rainbow Dash stepped forward, placing a hand on my shoulder and squeezing it. "You look sick. Did something happen over there?"

Jerking at the contact, I instinctively shrank. sliding my body away from her grasp. Now well aware that there was no hiding that something was wrong, I did what anyone would do when one of their closest friends offers their help.

"I'm fine. Gotta go. See you... around. Bye. I'm... going. Bye." My eyes darted between the girls, and I caught Rainbow taking another step towards me. I shot a hand up, stopping her. "It's not like that! It's... awkward."

"Do you need help?"

There's only one thing, and you don't have it. I vigorously shook my head, both at the offer and at the perverted thought. "I can handle it," I managed to breathe out. Sticking a hand up as I turned away, I gave them a lazy farewell before speed-walking to the parking lot.

I combed at my hair again, hoping to calm myself down. It was obvious that I was in heat - at least, I felt like I was in heat, regardless of whether it was physiologically possible for a human to be in that sort of state. My mind wandered, settling on an article I had read during a night of aimlessly musing the internet. It had referenced a study where males could sense when females were most fertile, whether it be through a slight scent or subconscious sexual attraction. Perhaps that was related to what was going on? After all, my ovulation period was coming up, so I was pretty... um, fertile.

Still, it didn't explain why I was suddenly so... horny. I'd been a human long enough to cycle more times than I could count, so the only other option was that traveling to pony Equestria had affected me somehow. I tried to remember how I had felt during school, but I was interrupted by a shout from behind me.

"Ball!"

A split-second later, my eyes wrenched open, and a soccer ball rolled away from me. For a brief moment, I winced as the pain of getting hit in the head finally registered, but bizarrely, it slowly disappeared, once again replaced by my perpetual arousal. Just in case, I massaged my scalp, confirming my concern as I felt signs of a bruise forming. Turning in the direction of the voice, I was greeted by Soarin, navy hair swept back and light blue skin glistening in sweat. The itch between my legs grew exponentially in his presence, but I swallowed any desire away before I said something I'd regret. With a apologetic smile, he held a hand out.

"Sorry about that, Sunset. Are you alright? The nurse should still be around, so I can take you there if you need her."

Initially, I put my hand out as well, but as our fingers touched, I pulled back reflexively. The athlete cocked an eyebrow, but before he could say anything, I jumped to my feet, wiping at the sweat that was running down my face.

"I'm fine! I'm fine." I brushed dirt off my skirt, eyes widening for a moment as my hand grazed a thigh, and I felt an unusual slickness. Like earlier, I gave a half-assed wave before continuing towards my car. Rounding the corner of the school building, I ran a finger along my leg once more, cursing as I was welcomed by a snail trail of... stuff... that had begun traveling down my thigh. I looked around, afraid that someone had seen such a bizarre action, but luckily, the only people hanging around the parking lot were the Apple siblings.

Awesome! Maybe Applejack can help me out. I made my way over to the trio, forcing a smile as they looked over to me. Applejack met me halfway with her younger sibling trailing behind. Meanwhile, Big Mac reclined along their truck, waiting for our imminent conversation.

"Howdy, Sunset! Saw you going into the statue earlier. How'd it go?"

I nodded slowly. "Alright. Nothing much."

"I see. Y'know, you should ask the Twilight over there if we can go over 'n' visit! Been wonderin' how different it is over there."

"I'll keep that in mind."

Suddenly, Big Mac cleared his throat loudly. We all looked over, and he gave his sister a stare. However, behind his silent demeanor, I caught a bead of sweat on his forehead, and when we made eye contact, he turned away nervously.

"Somethin' wrong, Mac?"

In a moment of extreme rarity, the elder brother spoke up. "I just remembered I gotta take care of somethin' at the farm." Focusing on his face again, I noticed his nostrils flaring, causing a blush to form on my face.

The sisters looked at each other before returning to face me. "You heard the fella." Applejack smiled sheepishly. "We'll catch you around, y'hear?"

"Sure thing. See you." Waving at the group, I crossed the lot to my own car, unlocking it and plopping onto the seat. Slamming the door, I stuck the key in, turning on the car and the A/C alongside it. I hoped that the cool air would help calm the powerful heat inside me, but it proved fruitless. While I sat there, I considered my options.

I could've try to ignore it for the rest of the weekend. There was no guarantee that I'd be fine by the time I had to return to school on Monday, and I'd probably go insane surrounded by all my peers. Not to mention, I'd be forced to sequester myself for a whole weekend, meaning my responsibilities, like homework and other errands, would have to be postponed, which wasn't really an viable decision.

Alternatively, I could try to... "deal" with it, but again, there was no guarantee it'd just stop. Furthermore, what did "dealing with it" entail? I hugged myself, hands slowly drifting down to my pubis. My eyes flickered over to my windows, then to my rear view mirror. Maybe I could try something here?

As if to answer my question, I spotted a couple of students walking across the lot. Granted, I was facing away from the school, but there was a risk that the owners of the nearby cars might return while I'd be busy. I removed my hands from the hem of my skirt, placing them on the steering wheel.

What if I asked someone to help? I mentally scanned through my friends: Twilight's smart, but she's booksmart. Sex is probably the one topic she's still unfamiliar with. Fluttershy might know about pony estrous, but I doubt the shelter gets many of them to warrant an extensive knowledge of it. Applejack's family might know about horses at least, but they don't have any on the farm, and I don't like the idea of asking her to randomly ask her relatives for knowledge on breeding horses.

I groaned, leaning forward and resting my forehead against the wheel. I skimmed through a couple more options, but none of them seemed appropriate. After each name, I got closer and closer to plunging a couple fingers into myself and doing the deed in the car, but again, passersby discouraged that option. Finally, I resigned myself to the second choice of my previous ponderings: I would try to get myself off.

However, I'd assign the help of a certain someone.

Reaching into my bag, I whipped out my phone, tapping through the contacts before finding the right person. I dialed the number, placing the receiver up to my ear. Within a few rings, a voice answered my silent pleas.

"Sunny? What's up?"

Peeking over at the rear view mirror again, I noticed the desperate smile that had subconsciously grew on my face. "Hey, babe, are you busy right now?" I mentally recoiled at how quickly the words left me, and based on the awkward pause on his end, it was likely he had noticed it as well. Luckily, though, he responded favorably.

"I've always got time for you. Why?"

"Can't really explain on the phone. Just meet at my place?"

Another pause. "If I show up and there's more rope..."

"No, it's not like that. I swear." I sighed. "It's... something."

"Wow. That doesn't sound ominous." My loins began to ache as I assumed an imminent refusal, but my boyfriend defied my expectation. "Just don't kill me, okay? I'll be over in a bit."

"Alright."

"Cool. See you."