Author's Note

Fair warning, the sex is a lot... messier... in this. Blame it on adhering to traditional Omegaverse tropes. Other than that, enjoy!

Chapter 1

Sweat beaded at Fluttershy’s brow and the hallway went dead silent from its usual noisy bustle of morning traffic. Canterlot University wasn’t a small campus by any stretch of the word, it was easily one of the largest community colleges in the area, in fact, so shutting everyone up simultaneously was quite a feat.

Of course, it is me, after all, so maybe it’s not so surprising.

Sunset Shimmer, Queen Bee and Big Dick Alpha on Campus. Where I walked, people moved, and where I looked, everyone else looked away.

“How’s your morning going, Flutters?” I smiled, my voice dripping with saccharine sweetness as I leaned forward, pinning the smaller and far more demure omega to the bank of lockers with my presence alone.

“Uhm, i-it’s going okay,” she stammered the words out, her cheeks flushing hot and eyes dilating as my presence overwhelmed her.

In Equestria, I’d been an Alpha among Alphas, but over here and all through high school I’d always assumed I’d ended up with a tamer pheromonal balance. That didn’t necessarily bother me either because, when it came to Alphas, with great power came a really obnoxiously intense rut. I’d actually thought I’d ended up with comparatively mild ruts, enough so that I barely noticed them.

It happened sometimes, and I was happy enough with that.

Seven months ago I’d been shown the grievous error of my assumptions because, as it turned out, my translation into this world had just seriously stunted my maturation in this body.

In short, I hadn’t noticed my ruts because I hadn’t had one yet.

And boy howdy had that first one been a fucking doozy.

“Well?” I planted a fist gently against the wall a few inches above Fluttershy’s head as I leaned a little closer, and I could practically hear her knees knocking together. “Aren’t you going to ask me how my morning is going?”

Fluttershy swallowed hard and licked her lips, and I had to suppress a shudder at the sight of that small pink tongue of hers.

“H-How’s your m-morning going, S-Sunset?” she asked shakily.

“Fucking phenomenal.”

I wasn’t even in rut and my pheromones were enough to knock Fluttershy for a loop, but that wasn’t surprising.

If I was an Alpha among Alphas, then Fluttershy was an Omega among Omegas. Perfectly soft and totally submissive, hitting her with the full blast of my scent was a little like sandblasting a soup cracker. She was a contentious point for CCU, though, because every alpha on campus knew that if they went for her they would get dragged down by all the other alphas who wanted her, making it a stalemate on their end, and Fluttershy hadn’t expressed any interest in choosing an alpha for herself, which made her something like the university’s Switzerland.

Until I stepped in, anyway.

“We got a problem here, Shimmer?” a voice drawled from beside me, and I scowled.

I glanced over at Applejack, one of the other more potent alphas. Even she was sweating in my presence but, to her credit, she didn’t tuck her tail and run like most of the others did.

“No problem,” I replied, grinning as I met the eldest Apple daughter’s green eyes before flicking my gaze back to Fluttershy. “Right, Flutters?”

Fluttershy swallowed hard again, tore her eyes away from me to look over at her friend, and shook her head.

“N-No problem, Applejack,” she said softly. “It’s okay.”

Applejack frowned and my heart leapt in my chest. Even as the main Alpha of the university I knew that, if Fluttershy said ‘no’, I’d still get my ass dragged through the halls by every angry alpha pulling a white-knight trick and jumping to her defense. If she was telling Applejack, the second-biggest alpha to yours truly, to back off, that meant Fluttershy might actually be making a choice.

A much wider grin split my face as I brought my hand down to rest lightly on Fluttershy’s shoulder, testing the waters, and sure enough she didn’t shy away from the contact. With that established, I turned back to Applejack and nodded at her.

“See?” I said, feeling smugly triumphant. “No problem.”

Then I turned, leaned closer to Fluttershy until my lips from inches from her ear and my cheek a hairsbreadth from touching hers, and whispered. “That’s my girl.”

A felt a shudder run through her and, to my surprise, she closed the distance and nuzzled her cheek very slightly against mine; a tentative mark of approval. She’d shared the smallest bit of her scent with me, and taken a stronger dose of mine onto herself.

Fluttershy would be carrying around a touch of my scent with her all day, and she knew it.

I had to fight back the urge to bite her, to mark her, right there. A low growl had taken up somewhere in the back of my throat, a rumble that drew out another shiver from Fluttershy. My lips were peeling back instinctively, and my alpha instincts were screaming at me to mark her, to make her mine right there.

Damn, she wasn’t even going through a heat cycle and my reaction was already this intense.

Not a chance though. You didn’t just mark an omega like Fluttershy, you had to court her properly.

Seeing the response, Applejack backed off, even as her mouth twisted into a grimace. She wasn’t going to argue with Fluttershy though, since the omega made her desires perfectly clear.

“You just gonna let that happen, sugarcube?” Applejack asked, her voice lower as she moved away, and I looked back to see her talking to Rainbow Dash.

Rainbow had been one of the other major alphas in the school up until about seven months ago, the operative word being ‘was’. If that coincidental fall in status seemed like it lined up right about with my first rut then congratulations.

No shit, sherlock.

Rainbow looked like she was about to have a conniption, but the moment our eyes met she wilted back and turned away, and in doing so exposed just a touch of her neck.

That’s right, Dashie… show me who your alpha is.

My eyes met her warm, cerise orbs, and I licked my lips, baring my teeth at her as I gave her my smokiest grin. There was the slightest widening of her eyes before she turned away fully, and I let out a low, throaty laugh.

Maybe my first rut hadn’t been all bad.

Seven Months Ago

Everything was bad.

My legs were twitching, my skin was on fire, I couldn’t sit still to save my life, and my dick was hard as a towel rack.

I’d thought my ruts seemed suspiciously light on this side of the mirror. I hadn’t realised those were just the normal hormonal up and downswings that the average human experienced.

In Equestria my ruts had been relatively intense, even by alpha standards, and had been annoyingly distracting.

This body’s rut was agonising.

It occurs to me only now that Equestrians, by nature, are a prey species, and so technically speaking their breeding cycles would be less intense than a predator’s. Humans, on the other hand, were the apex fucking predator of this world, and this current rut I was experiencing made my most intense cycle on that side of the mirror look like a campfire next to a continental blaze!

SNAP

I looked down at my pen I’d been fidgeting with. I’d had it clasped between my fingers and I’d managed to snap it clean in half, spilling ink all over my fingers.

“Shit,” I backed up away from my desk as our Professor, Missus Harshwhinny, came over with some paper towels.

One was held studiously up to her nose.

“Miss Shimmer,” she began in a low voice, “may I see you outside?”

I looked around, and grimaced.

Every omega in the room was in sweats by this point, with Trixie practically vibrating out of her chair trying not to jump me. Even the betas were looking markedly uncomfortable and I was pretty sure both Applejack and Rainbow Dash were about to start a row in the middle of World History on principle alone.

“Sure thing, Professor,” I grumbled as I helped her wipe up the mess.

My hands were shaking as I passed the towel back to her, then stood and followed her out of the classroom. We walked a good way away before she turned to me with a surprising amount of concern on her face. Most of my tenure here had held up Harshwhinny as the teacher least willing to take my shit, and that was including Dean Luna.

“Miss Shimmer I applaud your devotion to perfect attendance but,” she frowned and looked me up and down, “frankly, you’re a mess… you do know the University has a number of permitted absences allotted to you when your cycle comes around, right?”

“It snuck up on me,” I bit the words out tersely. It was technically the truth because I hadn’t even realised it would happen, much less that it would be this bad.

“I see,” Miss Harshwhinny sighed and shook her head. “Well, you’ll need to speak to Chancellor Celestia, she can fast-track you the paperwork for your permissions so you can schedule out your absences with your other professors if you know your cycle well enough.”

“It’s kind of irregular.” Irregular cycles were rare in my world, but they happened and it was the only reply I could think of so I hoped it would cut the mustard here or I was at least partially screwed.

“Intense and irregular,” Harshwhinny made a soft tutting sound with her tongue and shook her head. “That's unfortunate, my first husband was similar and it was quite an ordeal, Celestia may have some suppressants you can take, I’m sure she’ll offer you one.”

“Thanks, Missus Harsh,” I grumbled as she gestured towards the Chancellor’s office as if I didn’t know the way.

Not that I got sent there often at all, but I had the layout of the University memorised by my second week.

The halls were blessedly clear, I hadn’t realised how badly being around others was affecting me until I was alone. Even now I was probably polluting the halls with scent markings, I couldn’t even help it either which was humiliating.

Plus my situation south of the border was starting to become untenable. I was seriously beginning to hate the fact that I’d always chosen skinny jeans as my lower-wear because, no matter how good it makes my ass look, ripping through your zipper is never classy and the superheated piece of rebar between my legs was beginning to protest at length.

Hah, see what I did there?

I’m fucking hilarious.

Someone shoot me.

I reached Celestia’s office a few moments later, raised a fist, and pounded a few times. There was a slight delay before a muffled: come in, answered my knocks.

“Sorry in advance,” I called sullenly, and I stepped in to see a slightly confused looking Chancellor Celestia sitting at her desk with her younger sister at her side holding a few papers and wearing a similar expression.

The twin looks of confusion lasted about two seconds before both of their eyes flew wide. Dean Luna clapped a hand over her nose and scrambled to the back of the room, while Celestia just recoiled slightly like a bad smell had snuck up her nostrils and dropped a deuce.

“Oh dear,” Celestia mumbled before turning to her sister and shooing her away. “Luna, I’ll handle this one, obviously… I’d suggest a cold shower.”

Luna just nodded frantically before sprinting out of the room while doing her best not to breathe.

“Huh,” I grunted, “didn’t realise Dean Luna was an omega.”

“Few do,” the Chancellor relied wryly before grimacing again. “Sunset, dear, I’m the last person to try and impinge on people’s choices, and obviously the choice to take suppressants is a personal one, but this is-”

“It snuck up on me, okay!?” I snapped, my temper was already frayed, and I had to take a moment to just breathe slowly as I reached up and smoothed the damp tangles of my hair. I’d been sweating like a hog since my rut started and it was starting to get gross. “I’m sorry, I didn’t… It wasn’t on purpose, alright?”

Celestia gave me a sympathetic nod. “I understand, it happens to the best of us, and you’re only what… twenty-two now? You’re young, you’re allowed to lose track of time now and again.”

“Yeah, so… Professor Harshwhinny said I’d need paperwork to schedule my absences?”

The Chancellor nodded and began fishing around for paperwork, soon a manila folder full of papers were out in front of her along with a white bottle of pills.

“Here are the forms,” Celestia said with a warm smile, pushing them towards me, “and here,” she popped the cap and passed me a little gray pill. “Take one of these, they’re my prescription and I probably shouldn’t be giving them out, but you look like you’re in a lot of pain.”

“You have no idea,” I said dryly as I swept up the pill, tossed it in my mouth, and dry-swallowed it. “Thanks… hopefully it kicks in soon.”

“I have to say,” Celestia started as I sat down and began filling in the blank spots on the papers, “given the intensity of your scent and how my sister reacted, you’re probably even more potent an alpha than me.”

I paused and gave her a look, and she just shrugged.

“I’m only saying that as a warning,” she continued. “You can’t control your pheromonal output, but you should at least be aware of the effect it will have on others… you need to be especially careful around omegas, if they’re close to their heat you could trigger it prematurely.”

My pencil scratched to a stop, snapping the lead with a loud crack as I looked back up at her shock.

“Seriously?” I had never heard of an omega’s heat being triggered outside of a normal cycle before, but then again humans were a different species.

“Dead serious,” Celestia replied. “That’s why I’m warning you. If you don’t have a prescription for suppressants, I’d highly recommend getting one, I know it’s not something everyone is okay with, I know there’s a lot of people who see the heat and rut cycle as necessary for health and I don’t strictly disagree, but…” she gave me a level look and shook her head. “You have to consider more than just the surface, at your age your hormones are quite intense, I know you know that, Sunset.”

“I don’t need the birds and the bees, ma’am,” I was already feeling uncomfortable enough.

“This isn’t about that,” Celestia pressed. “This is about your quality of life and safety, and it is my job to see to it that you’re prepared to take care of yourself,” she took the completed forms from me and tucked them away before continuing. “Just bear in mind that between your hormones and having a rut this intense, what do you think would happen if you accidentally encountered an omega with a heat roughly similar?”

My stomach sank even as my alpha instincts thrashed inside my skull at the idea of it. The idea of a willing omega submitting to me, bending over and presenting herself to me… of marking her, knotting her…

Breeding her.

Ugh, maybe she had a point.

“I’ll make a doctor’s appointment later,” I allowed, “I’ll get a prescription.”

“I’m glad,” Celestia said with that beatific smile of hers that never seemed to fade even between dimensions. “I hope I didn’t push into something you’re uncomfortable with, but I really think it’s the best decision… Lord knows I had a bad enough time during my high school years going through rut, my mother didn’t believe in suppressants either so I just had to endure it and I’d rather you not suffer like I did since yours seems even worse.”

“Yeah… thanks,” I stood, rubbing my arm awkwardly. Chancellor Celestia knew full well I didn’t have a mother or father, I’d spun a relatively convincing story of being an orphan when I’d enrolled, so she had this odd tendency to mother me whenever we spoke. “I’m… I’m gonna go take a long, cold shower, if that’s okay.”

I jerked a thumb outwards and in the general direction of the gym, and Celestia just chuckled and nodded.

“You do that, and then head home, okay?” Celestia tucked away her bottle of suppressants as she nodded to me. “I’ll clear all of your absences for today with your professors, on the house.”

I laughed quietly, and nodded. “Uhm, yeah, thanks, Missus Sonnen.”

“Anytime, Sunset.”

I left the office in significantly higher spirits than I’d entered them in and started towards the gym. If I hadn’t been distracted by my rut and the constant pounding in the back of my head that neatly mirrored the painful throbbing below my belt I might have heard the low voices approaching from the corner I was coming up on, unfortunately…

Thud

“HEY!”

I stumbled and, on reflex, snapped a hand out to grab the person I’d run into, as much to regain my own balance as it was to keep them from falling over.

The one who’d yelled hadn’t been the one I’d grabbed. That voice had belonged to Rainbow Dash who was staring at me from a foot away looking utterly livid, I blinked, then turned to look at the girl whose arm I was still grabbing.

Fluttershy.

The omega’s omega, and the soft spot of every alpha in two districts, was staring at me, hyperventilating, with wide, dilated pupils.

She shook silently, her nostrils flaring slightly as she took in my scent, and a dark flush began to creep up her neck to her cheeks just as she snapped her legs together and let out a soft moan.

Rainbow slapped my hand off of her and stepped between us, her face twisted in fury.

“Stay the fuck away from ‘Shy, Shimmer,” Rainbow growled.

“I don’t see your mark on her,” I snapped, then almost bit my tongue.

Where had that come from?

“Uhm, p-please don’t fight,” Fluttershy spoke in that soft, featherlight tone of hers that sent electric tingles through my alpha brain. “I’m fine, Rainbow,” she said, glancing at her friend. “She bumped into me and stopped me from falling.”

“I would’ve stopped you just fine!” Rainbow’s voice was still laced with an undercurrent of rumbling growls.

“Whatever,” I grunted, moving around them and shouldering Rainbow out of the way as I did. “Move it Rainbutt, you’re getting between me and a shower.”

Rainbow Dash narrowed her eyes at me as I passed. I expected her to volley back but she didn’t, she just glared as I stalked down the hall. I could feel her eyes boring into the back of my head and somewhere in the rearmost corners of my mind my alpha was snarling and snapping at the bit for her to come after me.

I would’ve loved a good fight right about then. If I wasn’t going to fuck some whimpering omega into the ground I could at least blow off some steam with a nice punch-up.

The showers were empty when I entered, for which I was thankful. There aren’t any gym classes in rotation until the afternoon and onward, which means these showers should be empty for hours yet. I took the time to enjoy a nice, long, ice-cold shower which I barely felt the chill of past the scorching heat of my rut.

It was like trying to put out a roaring hearthfire with one of those little water droppers from Bio, but it was at least something. The painful edge of need also felt a little more distant too, which I attributed to the Chancellor’s suppressants finally kicking in, but as she had surmised, it wasn’t nearly enough.

Clearly, I needed a stronger prescription.

I stood naked under the ice-cold flow for almost an hour, silently trying to will away my erection and having approximately zero success. On my world my rut lasted about three to five days on average.

Reasonably, that meant I’d also have to endure three to five days of this shit.

Written’s Quill, I wonder if I accidentally teleported into Tartarus when I jumped through that mirror, fuck wouldn’t that be the ultimate twist.

If I have one positive thing to say about being an alpha mid-rut, it’s this: when you’re keyed up this high, ready to fuck for twelve hours straight and then immediately fight god for your morning bagel, it tends to heighten your reaction time, to say nothing of having all your senses dialed up to eleven.

That means that if some jackass tries to sneak up behind me in the ladies’ showers not only am I ready to fucking rumble, I am equally ready to die on that hill and take them with me.

My would-be assailant only got within about a half-meter of me before my adrenaline spiked, the alpha side of my brain screaming air-raid sirens that told me I was about to get jumped and, for once, it was right.

I spun on my heel, my feet planted on the damp tile as firmly as possible as I whipped an arm out and cold-cocked Rainbow Dash across the jaw, sending her sprawling.

“Wrong day,” I snarled, “wrong girl,” I stalked forward and planted my bare foot on her throat, “wrong choice, dumbass.”

She was still wearing her sportsgear, like always; a pair of too-short soccer shorts and a jersey, both of which were soaked through. She was shivering as the ice-cold water bit into her, and clearly enjoying it significantly less than I was, but then again her temperature wasn’t bordering on volcanic.

I saw a flash of real, genuine terror in her eyes and, honestly, I understood that much at least.

Look, all I’m saying is no one really wants to get into a fight with a naked bitch willing to kick your ass with a full erection, all right? That’s some seriously threatening energy right there, and I get that. That didn’t mean I wasn’t going to kick her ass, but it did mean I got where she was coming from.

Rainbow struggled for a moment, but I just levered more force onto her throat.

“Are you stupid?” I asked, then thought better and shook my head. “Never mind, that was a dumb question, obviously you’re stupid,” I gestured around us, “look where we are… better question is, did you seriously think that would work?”

“You fucked with Fluttershy,” Rainbow croaked past the arch of my foot. “I’m gonna break you in ha-urk!”

“Yeah, shut up,” I grunted as I leaned more weight on her throat. “You’re a piss poor excuse for an alpha, Dashie, y’know that?”

I reached behind me and cranked the water off, then took a step back from her. As she tried to rise, I threw a kick into her gut, sending her sprawling and coughing while I walked over to my towel, pulled it loose, and started drying off.

“You might’ve been big alpha on campus yesterday,” I continued as I walked over to her, “but all that changes now, capisce?”

Rainbow tried to stand, then stumbled and dropped to her knees as I reached her, and something about the sight stirred something in my chest which rapidly moved down through my gut to my loins, leaving a trail of fire where it passed.

I inhaled deeply, my nostrils flaring as I found the barest traces of her scent. They were hardly even there under mine, she was so far beneath me that it was hilarious, and she had tried to attack me? How had she even worked up the moxie to get close to me, to say nothing of…

Oh, of course.

As she tried to rise again I raised one leg, planted a foot on her shoulder, and shoved her back down.

“Sit, bitch.”

Rainbow hit the ground like a lump of coal, and her eyes flew wide.

“You made a huge mistake, Dashie,” I began softly, still using her as a pedestal, my foot on her collar and my cock hanging inches from her face. “You only got this close to me because you’re an idiot…”

I took a few steps back and smiled as she nearly fell forward trying to follow me.

“Can you smell it?” I let out a throaty laugh as I pulled the towel over my head, ran it roughly over my red-and-gold locks a few times, then pulled it free and shook my hair clear of my face. “My pheromones?”

And in so doing, sent a fresh and powerful wave of my scent into the air, saturating the showers.

“How about now?”

A low whine sounded from Rainbow’s throat as she tried to stand on legs that looked to be the consistency of jello.

“Stay, bitch.”

Rainbow froze.

“My pheromones were buried under an hour long shower and a suppressant pill,” I explained as I stalked forward, lowered myself to her level, and seized her by the jaw, “get it? This is me suppressed, and you’re still quaking and trying to run.”

“I… I…” She couldn’t even get a full sentence, or even a full word out.

There was something else, though… that fire burning in my gut. What was it?

I leaned in, pressing my nostrils to Rainbow’s neck, breathed deep, and shuddered as she let out another plaintive whine. Following a suspicion, I glanced down and smiled wide.

Thanks to the tight material of her shorts, it was clear that Rainbow was as bad off as me.

Turning my attention back to Rainbow’s neck, I took another breath, savoring the almost savory musk of her. It was the scent of an alpha, yes, but of a weaker one… a submissive one. It was the scent of an alpha whose pheromones had been totally overpowered and pummeled into the ground, leaving the alpha they belonged to a quivering mess, totally subordinate to the greater breed.

Oh fuck, she smelled good.

I pulled away, looked her in the eyes, and smiled as I noted how dilated they were. She looked, for all the world, like an omega.

“Do you want me?” I asked softly.

“I…” Rainbow’s voice came out as almost a sob, and I knelt, drawing closer in until our lips were almost touching.

“Go ahead, bitch,” I muttered, my too-hot breath tickling her lips. “Say it… say yes, say you want me, say that I’m your alpha, and I will make you feel so good.”

“I…” Rainbow started again, then faltered, some part of her pride choking her for a moment. It was a death rattle, though, because her next words were the ones I wanted to hear.

“I want you.”

“And…?”

“I… I want you,” Rainbow repeated, “my alpha.”

I didn’t waste another moment. I pushed Rainbow to the ground, sealing my lips over hers and dominating her tongue with mine as I gripped her jersey and started pulling it off, only breaking away from her to throw it to the side.

She was too flat to need a bra, part of being so athletic I suppose, but I’ve always been a fan of the idea that any more than a handful is a waste, so I was perfectly happy to cup her modest breasts as I pulled her closer.

I rutted against her, my cock grinding against hers where it was still restrained by her shorts. I made short work of those, Yanking at the tight material at first, but getting frustrated as it failed to yield.

“Lay down!” I snapped, and Rainbow fell to her back, her throat laid bare for me as I seized her shorts, gave an almighty heave, and tore them letting her cock swing free.

It wasn’t quite as impressive as mine but it was nice enough, six and a half inches to my eight and change.

She let out a low, needy moan as I took a steady grip on her cock and began working the shaft up and down with slow, torturous motions.

“Like that, little bitch?” I cooed, crawling over her until I was straddling her, my cock pressed against hers, my pheromones totally overwriting her own as I stroked her. “Who’s your alpha?”

“Y-You are,” Rainbow moaned, her legs shaking as cum beaded at the tip of her cock.

“Say it again.”

“You are!” Rainbow groaned as I speed up my ministrations on her.

“I’m what?!” I snarled. “Say my name!”

“You’re my alpha, Sunset!” Rainbow cried out, then she jerked spasmodically, bucking her hips as she climaxed, sending streams of seed shooting in arcs into the air.

They sprayed haphazardly across her, covering Rainbow in spurts of her own cum as she panted, humiliated and satisfied, on the floor of the locker showers.

I wasn’t even close, though.

“Turn over,” I commanded, and Rainbow’s eyes widened.

At first she didn’t move, she sat there as if waiting for me to tell her I was joking. I half expected her to leave then, to get up, tuck tail, and run like any other sane alpha would have.

She didn’t.

Instead, Rainbow slowly shimmied out from beneath me, then flipped over until she was on her stained belly with her arms wrapped protectively around herself.

“Hands and knees, bitch,” I spoke with an iron to my tone that surprised even me, and this time Rainbow obeyed without question, presenting her tight, pert little ass to me.

I could see her cock and balls hanging between her legs, her length starting to harden again as her alpha brain tried to catch up to what was happening.

Was I seriously going to do this?

This wasn’t a joke… taking another alpha like this was rare, and it was almost the ultimate show of dominance.

I moved closer, slipping my length between her cheeks and rubbing forward and back, the sensation sent lightning bolts of pleasure up my spine that curled back around to strike down into my gut.

There was a word for this… a word I’d been using on reflex, but was now about to become very real.

Bitch.

By definition, a bitch was an alpha who demurred fully to another alpha in all ways, but especially sexually. It referred to one alpha who acted for all intents and purposes like an omega to another alpha. It humiliated them, degraded them, and… and it was fucking exhilirating.

With a grunt of effort, I moved over her, positioning myself at her tight back entrance.

“Relax,” I whispered softly as I laid my full weight over Rainbow, and she shivered as I nipped delicately at her ear. “Your alpha will take good care of you…”

Another soft whine left Rainbow’s throat, but she nodded, and leaned up to nuzzle against me, a deliciously submissive action that gripped at the alpha inside me and yanked it fully to the fore.

This was mine.

She was mine.

I pushed forward, pressing against that tight ring, then grunted in satisfaction when it gave out against me and my first few inches slid inside of Rainbow Dash, well and truly making her my bitch.

Further and further, I pressed in slowly, giving my little bitch time to get used to my girth and length. Rainbow Dash whimpered softly, her body pulsing and relaxing underneath me as she submitted, suborning her own alpha will completely to mine.

I bottomed out with a gasp, fuck she was tight.

Honestly, I should have known a runner would have an especially tight ass but this was beyond the pale.

“Who’s my good girl?” I purred, running my hands down her sides, around her hips, then between her thighs to take hold of her rock hard cock. “Tell me… hmm?”

“I… I am?” Rainbow mumbled in a daze, and I started stroking her member in response.

“That’s right,” I replied, and she moaned as I began rocking my hips slowly to the same tempo. “You’re my good girl… my good little bitch alpha.”

Another moan, this one of pure pleasure and happiness, left Rainbow, and it tickled something primal in me.

The need to protect what was mine.

To feed her… shield her…

Breed her.

I stared rutting Rainbow in earnest now, all slowness gone as she shook her hips against me, pushing back and all but begging for me to fuck her harder. I obliged, and happily, seizing in her by the hair and bucking my hips against hers, bottoming out over and over.

And as I did, I felt something pressing at the base of my cock.

My knot.

My rut was demanding an omega. It wanted me to breed, and it wasn’t particularly choosy about who was beneath me. The thought of knotting Rainbow should have repulsed me, but it didn’t, it filled my heart with fire.

Taking another alpha as my bitch like this was nearly the greatest show of dominance, but only ‘nearly’.

The ultimate show was knotting that alpha. Treating them like a breeding mate but only for pleasure. An Alpha would never be able to bear children, that was the remit of Omegas and certain Betas, so knotting an alpha like this was pure domination.

Pure pleasure.

As I pounded Rainbow’s ass, she muttered and whined incoherently, shaking her hips against me with every thrust. She had to be able to feel my growing knot, but she wasn’t pulling away.

She was trying to get closer.

“Do you want it?” I growled, leaning and biting Rainbow’s ear gently, tugging at her earlobe as she shivered.

“Ye~s,” Rainbow almost sobbed the word out.

“You want me to knot you?” I hissed, pulling back and then leaning down to lick along the back of her neck where her scent glands were. “You want to get knotted by a bigger, better alpha?”

She moaned her assent.

“Beg me,” I pushed in all the way to my knot so it was pressing against her. “Be a good little bitch and beg for it.”

“Knot me,” Rainbow sobbed, “please knot me!”

“Oh fuck,” I swore.

That was the hottest thing I’d ever heard, and my knot swelled as I pushed hard against Rainbow ass. Rainbow cried out in ecstasy as I passed her ring and locked myself inside of her, inside of my bitch, and rocked my cock inside the tight tunnel of muscle.

All the while I jerked Rainbow off, sending spurts of cum out to stain the tile as I felt my own climax peaking.

“Oh fuck, oh fuck, oh fuck,” I repeated the words over and over as my mind started going white.

“I’m gonna breed you, Rainbow,” I snarled, laying my weight on her completely. “I’m gonna fill you up and fucking breed you!”

Rainbow was reduced to wordless cries of pleasure as her legs buckled underneath me.

My whole core tightened up in a single, monstrous wave of pleasure as I bore Rainbow down to the ground, struck my peak, and came.

I clapped a hand over Rainbow’s mouth in a moment of clarity as she howled; I couldn’t let anyone see us like this, see her like this. I felt her cock jerk, pinned underneath her as it spasmed out another load while I filled her ass with my cum.

Streams of it spilled from me and my knot kept every drop of it inside her. Inside my pretty little rainbow-headed bitch.

Rainbow moaned against my hand, flecks of drool slipping between my fingers as she squirmed mindlessly beneath me. Without thinking, I pressed my nose against the back of her neck, taking a deep breath, memorising her scent, imprinting the smell of my omega-

No… she’s not an omega, she’s an alpha. I have to remember that, but it’s so hard to keep it straight in when she’s like this.

A deep, baritone growl rumbled up from my chest as I ran my tongue over the back of her neck again and again, getting it ready for me, for my mark. I opened my mouth, bared my teeth, and…

Stopped.

She was breathing fast and sharp beneath me, not struggling, not fighting, just waiting for me to take her the way I wanted to and the way she wanted me to. She wanted me to mark her, but I knew that the only reason she felt that way was because I was on top of her like this. The moment she came back to her senses, the moment my pheromones weren’t driving her libido into the stratosphere, I knew that she’d regret it.

And I’d regret it.

An alpha did not mark another alpha. It isn’t even a sign of dominance; an alpha letting themselves get marked like an omega was nothing short of the ultimate humiliation. If I gave her my mark, if I left my bite on her glands like this, she would carry my scent with her everywhere, announcing to the world that she belonged to me and me alone.

It would be like putting up a billboard in Downtown Canterlot naming her as a Grade-A bottom bitch.

Rainbow was too proud for that, and the shame would… it would ruin her.

I pulled back, and Rainbow let out a soft, plaintive whine.

“Ssh,” I murmured softly as I gathered her up in my arms and pulled her close. “Your alpha has you… it’s okay.”

We were still linked, and although my rut was keeping me warm, uncomfortably so, actually, Rainbow had no such benefit. It was freezing in here, the tiles were cold from my shower, and the water that was still dampening the tiles was no better.

So I wrapped her in my arms and shared my warmth with her as I kissed her along her shoulders and neck.

“I’ve got you,” I whispered, “just relax.”

I pulled my hand away from her mouth and Rainbow turned, instinctively seeking the lips of her alpha.

I let her find them, and I kissed her slowly and gently.

Look, I may be a righteous asshole most of the time, but let no one ever say that Sunset Shimmer doesn’t know how to treat an omega. Even one that’s, in fact, actually another alpha.

Ugh, what a mess.

I should let go, I really should. I could feel my knot dying down, and I knew Rainbow could too by the way she pressed against me, trying to keep me flush against her, but I could definitely let go, except… this was the danger of knotting. Alpha’s had a deeply intense protective streak for their omegas, and even though Rainbow wasn’t either of those things, mine or an omega, I’d still knotted her, and my alpha instincts were still screaming at me to keep her safe, to protect her, feed her, and shelter her.

To be a good mate.

Shit.

The intensity of my rut was dying down, having been temporarily sated inside of Rainbow Dash, and my head was starting to become blessedly clear. I hadn’t realised how bad it had gotten, my head felt like it had been full of wasps before now, and finally the buzzing was gone.

I pulled free of Rainbow, and she let out another soft noise of dismay.

“Ssh, it’s okay,” I muttered again, slipping my arms beneath her and lifting her up.

Rainbow curled against me as I carried her into the locker room, burying her face in the crook of my neck and seeking the safe presence of her alpha the same way an omega would: by scent.

This was bad, the more she drowned herself in my pheromones the longer it would take her to get her head back on straight.

“What’s your locker number?” I asked quietly.

“Thirty-two,” Rainbow’s reply was soft and sleepy as she nestled against me. “Code is seven, seventeen, twelve.”

I walked over to locker thirty two, fumbled a little to get a hold of the lock without letting go of Rainbow, and managed it after several aborted tries. I grabbed some spare clothes and a towel, moved to a bench out of sight of the main doors in case someone came in, sat down, and started the involved process of cleaning up my bitch.

After getting myself tidied up and dressed it took another ten minutes to handle Rainbow, but eventually I got her into some fresh clothes.

I’d had to put Rainbow down for that part and she hadn’t liked that one bit, but she also couldn’t deny me at this point. That was one of the reasons I had to be so careful. Alpha or no I had to treat Rainbow like a post-sex omega at this point because she’d pretty much say yes to whatever I wanted and that…

That was something I didn’t have any desire to abuse.

The thought of it made me sick, actually.

“Hey… Sunset?” Rainbow’s voice was significantly less groggy now as I led her out of the locker rooms and into the afternoon daylight.

“Yeah?” I had my arm around Rainbow’s waist, mostly because my hindbrain shrieked bloody murder every time I tried to let go of her.

Fuck these alpha mating instincts.

“Did uh… did that just happen?” Rainbow’s words came out shakily, and I grimaced.

“In the words of your friend’s brother,” I replied dryly, “eeyup.”

Rainbow shivered, stopped, then hunkered down and started to shake.

“Oh fuck,” Rainbow swore quietly. “Fuck, fuck, fuck!”

“That pretty much covers it,” I admitted as I paused to stand over her. “In my defense, you were the one who had the bright idea to attack me mid-rut.”

If there was one way to pretty much guarantee a dominance exchange between two alphas, that was it.

“I gotta get outta here,” Rainbow stammered as she stood shakily, wobbled on her feet, then turned to run.

My instincts screamed at me to follow her, to stop her from leaving, but I bit them back. They were primordial instincts, and I couldn’t let myself be overcome by them. I couldn’t allow them to just rewrite my brain. If Rainbow wanted to leave then I’d let her leave.

What else was I gonna do? Chase her down, club her with a jawbone and drag her back to my cave by the hair?

You, bitch, me alpha, Ooga booga.

Screw that cavewoman bullshit. It may be physically painful to let Rainbow leave but-

“SHIT!” Rainbow hadn’t even gotten two meters away before she spun around, stomped back to me and buried her face against my neck.

I almost jumped out of my skin at the sudden contact while Rainbow just took several slow, deep breaths until her shakes stopped.

“I guess… this is a thing now,” I muttered as I wrapped my arms around her tentatively.

“Fuck you, Shimmer,” Rainbow growled, but the fact that she was doing it while nuzzling my neck robbed her words of a lot of their sting.

“Uh… wanna walk me home?” I asked quietly, and Rainbow froze, then sighed and nodded.

What a mess.

“Home sweet home,” I said sullenly as I pushed the door open to my crappy one-bedroom flat.

It was on the fifth floor of a low-income housing project in the Ponyville Commons which was largely agreed upon to be the shittiest part of Canterlot.

Rainbow Dash sniffled as she followed me in, took a deep breath, and then started to relax.

“C’mon, dumbass,” I grumbled.

I dragging Rainbow along and pushing her into the one decent seat in the place, an old, comfortable easy chair I'd scavenged from the curb, which was my usual spot for relaxing.

She looked despondent, and I sighed as I leaned against one of the walls, trying to find something to say.

“It’s not that bad,” I said weakly.

“I’m a bitch,” Rainbow groaned. “It’s definitely that bad.”

“Yeah okay, fine, it is!” I threw my arms up as I stomped into my kitchen. “But it was your bright idea to assault me mid-rut, not mine, alright?! What did you expect would happen?”

I pulled out a pair of cokes from my minifridge, cracked one open and passed the other to Rainbow who took it and popped the tab.

“I thought I would win,” Rainbow admitted quietly before taking a drink.

“Win?!” My hackles went up sharply and Rainbow’s eyes flew wide as I squared up on her. “So wait, your big plan was that you were gonna bitch me?”

“What!? No!” Rainbow set the coke down and stood up, real panic in her eyes as she moved next to me. “I wasn’t gonna- I swear! I was just… fuckin’... I don’t know! I was just pissed off, okay?!”

“You went in with no plan,” I stalked forward, driving her back as my alpha instincts raged in my chest, “no idea what you were doing, and looking to start a fight with a rutting alpha? There was only one way that was going to go, dumbass!”

Rainbow staggered back as I advanced on her, I set my coke down before her grabbing her by the collar of her shirt.

“Well, guess what?!” I snapped, “now you’re my bitch, and you’re gonna stay that way until I say otherwise, got it?!”

I stepped back, grabbed my coke again, slugged it back, crushed it, and tossed it over my shoulder into the trash. My rut was starting to rear up again, and I could feel my temperature spiking as Rainbow fidgeted awkwardly with her own can.

“Finish it,” I said coldly.

“W-What?”

“I said,” I pointed to the coke, “finish it.”

Rainbow swallowed hard, looking down at the coke, then back up at me. I could see her instincts warring with one another. The alpha in her wanted to argue, but I’d just knotted her and that submissive impulse was still rooted deep in her brain.

“Why?” her voice was weak.

My mouth took on a thin, hard line.

“Because my rut is coming back,” I said heatedly, “and you’re gonna need the caffeine, bitch.”