Quite Contrary

Mary always knew her dumb fucking libido would be the death of her, but not like this.

Tragic bondage accident involving nipple clamps and an arc welder? Sure. Head-on collision due to creative yet ill-advised stick shift usage? Yeah, that tracked. Shot by a jealous lover after torrid getaway photos ended up on social media? Honestly, fair.

Yeeted into orbit by a pissed-off purple alien unicorn before the come could even drain out of her overstuffed womb? Not on the bingo card.

Swirls of Twilight’s pearly seed surrounded Mary, caught up by the same gravity inversion magic that was currently hurtling the doctor butt-naked through the stratosphere. The drops sparkled in the sunlight along with errant rocky grains, all suspended in place as if they were just floating merrily instead of moving at terminal velocity.

As Mary tumbled, the lines between heaven and earth blurred, inverting the domains over and over until she could scarcely tell the difference between them. She reached out frantically, her hands groping toward the detritus girdling her as if, by a touch, she could cancel the terrible enchantment and at least allow herself to reach an apex, ending it all with a hot splat instead of staying with her current frigid trajectory. But her fingers slipped past the shining crystals of sand and semen, and she felt only the breathtaking cold of the wide blue sky, quickly shifting to black, that was already stiffening her extremities.

Twilight could have at least tossed her a jacket. Or pants, or socks…anything would have been good, really. Mary’s sense of time was understandably skewed, but it had probably only been seconds since she left the ground, though it felt like forever. How much longer did she have? Another minute, two at the most? The draining sensation of her body heat fleeing was turning her inside out. Mary was going to die of exposure, without even being able to do the doomed snowstorm victim thing of passing away blissfully in her sleep. Life was unfair.

A white haze covered her vision, and a sudden chilly wetness soaked her skin as if she’d been plunged into an icy lake. Of course, she had to pass through the one cloud in the entire sky this high up, damn near flash freezing her and cutting her survival time in half. At least she was growing numb now, feeling less pain in her lips and toes…which was actually a very, very bad thing, but what difference did it make? The sooner this all ended, the better. What was she waiting for?

Mary broke out of the other side of the wispy curtain, noting in her existential terror that the droplets of come still pouring out of her gaping cunt had solidified in mid-air. The gleaming bits twinkled against the darkness of space, forming strange asterisms, and Mary admired their ethereal beauty before remembering what they were and where they’d come from. Then, she wanted to crunch the stupid crystals between her teeth like grape Pez.

Fucking mule couldn’t even let her have a lyrical death. So unfair.

A crust of ice began to develop on her body as Mary approached the boundary of space. She blinked, but her eyes did not re-open as the brutal cold froze her eyelids shut. Her existence became nothing but darkness and howling wind in the frostbitten ears of a body in motion, though even that constant sound was starting to fade as her senses dulled, and her mind turned inward in the way of all sentient creatures on the verge of death.

If she ran into Newton in the afterlife, Mary wondered if he’d laugh or cry as she tried to explain the principle behind magical acceleration. It was an idle thought that was unlike her, and a corner of her awareness knew that she was now deep in delirious shock, but that was fine. Mary had never been very religious; she’d grown up Catholic, though as her natural proclivities made themselves apparent upon adulthood — before that, if she was honest — she soon came to understand just how incompatible her personal morals were with the tenets of Christianity. And so, staying true to herself, she clung only to those ideals that resonated with her, treating the rest as unnecessary baggage.

Bullshit…that was too kind. Mary used others’ values as surgical tools, cutting deeply into the people around her while desperately trying not to let the scalpel slip. She hadn’t always been successful.

Facing annihilation now, would Mary have done anything different? No. She was astonished to realize that she harbored no regrets, now that it was all coming to an end. The doctor felt a little cheated about not having the full measure of her life pass before her eyes like she’d expected, but from the bits and pieces floating through her dying mind, she knew she could face eternity with her head held high.

Well…there was one thing. As Mary began to slip away, her last conscious thought was her wish to see Twilight take the ass-kicking she had coming to her. Or barring that, the mental healing and reconciliation that she also deserved. Justice was weird like that. People were weird like that. She knew Celestia would have agreed…

Mary felt a jolt of softness, as if she’d landed deep in a pile of feather pillows. Had she breached that final barrier at last? She wanted to open her eyes to behold the splendor of the next world, but her body wouldn’t obey her commands. The doctor only felt an unusual sensation that she eventually recognized as heat, fierce yet kind, burning away the piercing chill that had been her constant companion and replacing it with healing warmth.

“Forgive my tardiness, little pony. I’ve been a bit…indisposed.”

It seemed that Mary wasn’t dead quite yet. Her body was clearly shutting down, however, and now she was hearing the one voice she wished to hear above all others. It was a hideously cruel trick, but instead of crying out in rage, she only croaked a word out of a throat that was, at last, beginning to thaw.

“Tia?”

A shudder went through the plush something against Mary’s skin, and she heard a relieved exhalation of breath. “Yes, Mary. I’m here.”

Fingers with a new wealth of feeling recognized the short, soft fur covering a chest that was working like a forge bellows, stoking hot blood and breath to feed a dire need. Mary felt the frozen scales fall from her disbelieving eyes, and she gazed up at a snowy equine face topped with a horn that shone with perfect resplendence.

Celestia — beautiful, maddening, perverted, wondrous Celestia — looked down at Mary with an expression filled with such happiness it almost made the whole ordeal worthwhile. She was wreathed in a corona that burned with all the colors of the rainbow, and the icy particles around them sizzled and evaporated upon contact, unable to withstand such overwhelming flame. The doctor felt life returning to her exhausted limbs, and she could no longer deny the truth that now embraced her. The Princess was real, and Mary would not die. Not yet, anyway.

Mary wanted to laugh, or shout, or dance a jig in mid-air, but instead she felt hot tears streaming across her cheeks, billowing out into the wind. Rationally, she knew she was feeling a mixture of relief, elation, and any number of other extreme emotions, but there was a deceptively simple core underneath all the rest. Mary said the first thing that came into her head as she sobbed against her lover with complete abandon, and they were the most genuine two words that had ever sprung from the lips of such a born liar.

“Thank you.”

Celestia returned Mary’s heartfelt regard with a gentle smile of her own, but it was strained with effort. Her eyes were bagged and ringed with dark circles, making her look like she hadn’t slept in days, though it had been no more than a quarter of an hour since they’d last seen each other. “Your thanks are a bit premature, Doctor. You know I like being appreciated, but let’s shelve the happy reunion for now.”

Mary struggled to contain herself, wiping her eyes with new determination as she took stock of their situation. They were still rising fast, and the doctor looked up to see stars shining with a diamond-bright intensity that she’d never seen from the ground. The disc of the moon hung in the black sky like a hole in reality, and the contours of its great mountains and valleys stood out in sharp relief, as if they’d been painted in oils by an old master.

They were almost in orbit, and now the only thing keeping Mary’s insides from boiling into space was Celestia’s fiery protection. But it was starting to look like that might not be enough to get them out of their predicament, as Twilight’s spell was still going strong, and their current vector was somewhere between Gemini and Orion. Being saved from freezing to death wasn’t that great if the alternative was spending the rest of that life drifting through the interstellar void.

“This is…the part where you say everything’s going to be all right,” Mary rasped, struggling to find her voice again as she fought off panic. “What’s the problem? Why are we still headed out of the Solar System?”

“Someone’s demanding,” Celestia grunted as beads of sweat poured from her forehead. This was a frighteningly unique phenomenon, as Mary had never seen the Princess sweat, not even in Erin’s dream. “The problem is that Twilight locked her spell with one of her cute puzzles. It must be an original creation, because I’ve never seen one so complicated. Just…give me a moment.”

Mary felt a spike of cold fear overcome Celestia’s blazing fire for a brief second. She clenched her teeth to keep from saying the thought that came unbidden: “You’ve never been able to solve any of Twilight’s puzzles.” That was the last thing either of them needed to hear right now. Celestia would figure something out…she always did. Doing crazy shit like this was like her superpower, right? Mary couldn’t give up hope, not now. Maybe they could-

“There we go.” Celestia’s horn blazed with a final burst of power before settling into a weak incandescence, and the Princess let out a hiss of breath, yet the strain in her face did not lessen. “Hold on tight, little pony. The ride down is going to get rough.”

“Huh.” Mary couldn’t quite think of a better response.

Then the bottom dropped out of her stomach, and she gulped down a wave of nausea as their demented elevator ride slowed to an abrupt stop, offering a momentary taste of weightlessness at the vertex of a terrible parabola. Celestia’s technicolor mane wreathed her like a lion’s majesty, floating wild and free, and the strands tickled the doctor’s face as she clung to the Princess’ barrel. Far, far beyond, the stars seemed to call to her, and before she could stop herself, Mary reached out a hand to grasp one of those faraway points of light, knowing that she would never be more fully surrounded by such perfect beauty than she was at this exact moment in time.

But before Mary could claim her shining prize, the natural pull of gravity reasserted itself, and the cold perfection of those heavenly bodies retreated for all time. The doctor felt herself starting to slip out of the Princess’ clutches as they both began to drop, and Mary wrapped her arms tightly around Celestia’s neck, fiercely digging her fingers into the cashmere-soft hide as she watched the world below grow in her view. She felt her legs come up above her as their descent picked up speed, and the two lovers plunged head-first back to the pale blue dot that was their home, in this dimension and the next.

Mary wasn’t ready to die yet. She knew this now, without a glimmer of a doubt. She wanted to see Erin become the best version of herself she could be. She wanted to convince Luna to extract the stick from her ass and live a little, instead of watching others do so. She wanted to make tight little Julie scream her name again. She would have even liked to hear Lt. Kurosawa give her grief one more time.

More than anything, however, Mary wanted to get to know the true Sun Princess Celestia, instead of the distorted version in her head that had led her to such pitiful misjudgment. Somewhere along the way, she had started to conflate “ageless” with “unchanging,” and the doctor cursed herself for doing the Princess such a disservice. Why did she think that Twilight was the only one who could grow and learn over the long centuries? Why did she take the younger alicorn’s brilliance for granted, while discounting Celestia’s intelligence, wisdom and innumerable experiences? How had she failed to understand someone she cared so much for, so badly?

Mary scarcely heard the cold air whistling past as she plummeted, so mortified was she at her own hubris. She could only hope that Twilight had underestimated her former mentor just as thoroughly.

“Guess you’ve been practicing your solving skills, huh?” Mary shouted over the howling winds as the blue-green Atlantic stretched out beneath them. “You use an algorithm, or just brute force it?” The doctor knew she was babbling at this point, but she needed to unburden herself, even if this wasn’t exactly the perfect time. “Look. I didn’t mean to doubt you, okay? I, uh…I need you to know that. I should’ve believed in you the whole time. You may be a weird fucking deviant, but you haven’t let me down yet. And I know you won’t let Twilight down, either.”

The Princess didn’t respond right away. This did little to calm Mary’s nerves as the air blew past her ears, and the doctor risked craning her neck away from the protection of Celestia’s barrel to get her bearings on the alicorn’s condition. She was shocked to see eyes tightly closed, and a face furrowed in pain.

“Hey. Stupid question, but you all right? I know you’ve been putting in work, but they say communication’s the key to a good relationship, especially when you’re in freefall from a few miles up. Talk to me, Tia.”

Celestia gave a dry chuckle that turned into a rattling groan, and the sounds were barely audible over the atmospheric noise of their descent. “I’m afraid…that I’m not all right, little pony. My magic…has been tapped…that puzzle…harder…than I imagined…” Each word was hard-won, drawing from reserves that were quickly running dry. “I’ll try to…keep you alive somehow…when we alight…but no promises.”

When we alight…as if they would come to a gentle rest on the tiny island like dragonflies on a fucking rosebush, instead of leaving a smoking crater on the beach or slamming face-first into the Atlantic. Mary was starting to feel more of the cold flowing across her bare skin now, which told her that Celestia’s protection was waning fast, and suddenly their chances of survival began to approach a percentage that was much too low for comfort.

“Your plan does not inspire confidence!” Mary gripped Celestia’s underbelly tighter with her thick thighs, brushing the alicorn’s feathered pinions with the soles of her feet. “How ‘bout you show off what these wings can do? Or are they just there to look cool?”

“I regret to inform you…that my ass is even less aerodynamic…than it looks,” Celestia grunted. “I can’t even glide…without my magic. I’m so sorry…little pony.”

“You can apologize after I’m dead,” Mary said fiercely, though the outburst was more to hide her fear than anything else. Of course, Celestia was right. Unless she was hiding a two-stage booster rocket up her rectum, she couldn’t have made it from under the ocean to the edge of space without mystical assistance. All the costs of her rescue began to add up in Mary’s head — the flight, the comforting halo against the cosmic vacuum, the cracking of an unprecedented spell lock — and suddenly it was the doctor who wanted to beg forgiveness, even as Twilight’s coup de grâce became all too clear.

Meanwhile, they were still in a tailspin toward an island that was growing larger every second.

It couldn’t end this way. Mary was going to go out with a cute girl munching her box and a dildo the size of a caber up her ass, not splattered into a fine mist against the merciless ground. There had to be something…she needed to think…

Mary began to carefully climb around to Celestia’s withers, taking each hand and toehold one at a time, knowing that if she lost her grip, it was all over. The Princess stirred as she felt the doctor working her way across her limp body.

“What are you…please…you need to hold on tight…”

“Shut the fuck up for a second. I want to try something.” Mary meant to tell Celestia to conserve her strength, but her haste blunted her words. And it was less a try and more of a desperate gamble, but the doctor didn’t see any other options as she clambered onto the top of that broad white back.

With a strong enough magical kick, one could jump-start a spell though an alicorn’s horn. If that was the case, was it possible to do a direct transfer of power, without a conjuration in progress? Celestia had once said that Mary possessed a spark of magic somewhat higher than the human average. If so, the doctor had to hope it was enough to get some flight going, or at least a more controlled fall. And she had to do it post-fucking-haste.

Mary took a deep breath, feeling chilled air enter her lungs as she reached for Celestia’s spiral of ivory. Though it was no longer illuminated with magical energy, the doctor still found the foot-long spike dangerously imposing, representing a depth of power that she had to hope was not yet completely spent.

At any other occasion, Mary might have been hesitant to touch Celestia’s equipment after such intensive use, but she had no time to consider any lingering effects. The doctor firmly took the horn in both hands, feeling a current of electric warmth under her palms that sent tingles up her arms and across her chest in heart-stopping cycles. She began to stroke the pale spire like a cock as her body instinctively reacted to the familiar form factor, and she licked her lips in preparation for the next step.

Mary was playing all of this by ear now, and she tried not to think about scary concepts like magical feedback or overloading as she brought her face closer. Fortune favored the bold…and the desperate.

The flat of Mary’s tongue caressed the textured ridges of Celestia’s horn, and the doctor felt a jolt that momentarily overwhelmed her, as if she’d licked a charged 9-volt battery. She forced herself to stillness, and the intense sensation unfolded like a flower upon her taste buds, revealing itself to be an ultra-concentrated flavor that took a few seconds to decipher as she brought her lips to bear, licking and sucking the surface of the proud spiral with practiced skill.

It was vanilla. And not in the sense of default blandness…no, this was anything but. It was the taste of vanilla beans, pure and sweet, infusing Mary’s mouth with the impression of the creamiest root-beer float she’d ever drank. Or maybe it was a devil’s food cake, fluffy and moist, piled high with frosting so rich she felt her butt grow another inch just imagining it.

The taste of Celestia was a decadent melange, and Mary’s original mission became secondary as she brought her mouth to the rounded tip of the horn, opening herself wider to admit the candied spiral into her gullet. It was impossible to take much more than the first few inches, unfortunately — Mary wasn’t completely heedless of the danger to herself sans shaping magic, and the turbulence rocking her didn’t help — but she was able to swallow enough to light up her more submissive pleasure centers, causing her to give an inadvertent horn job as her head went up and down. The doctor whimpered in confused bliss, while her hands stroked the bottom of the shaft, working it to completion.

Mary felt Celestia shudder underneath her tender manipulations, and she hummed deep in her throat, knowing that the sensitive spiral was transmitting each lick and suck to the Princess’ body like an antenna. Then Celestia twitched with a bolt-of-lightning sharpness, almost bucking the doctor loose, and Mary grunted, struggling to hold on tight.

She quickly extracted the horn from her esophagus with a moaning gasp, as if awakening from a blissful dream. As she did so, she felt the tingle of an energy she’d never felt before in her life, and her limbs suddenly became heavy, like she’d just run a hundred-meter sprint. Something had happened.

“Celestia?” Mary said, her voice slurred. “How you feeling? Did that do it for you? I swear to god, if I have to climb up and stick this thing in my-“

Before Mary could finish her thought, Celestia’s horn blazed with a stark radiance that defeated her vision, leaving ethereal afterimages in the encroaching darkness of late afternoon. Then there was another jostle, and Celestia’s no longer vestigial wings unfurled, inexplicably growing to twice their original size as they cupped the wind, freed from the shackles of conventional physics at last.

“We’ll revisit that later tonight,” Celestia said in a teasing drawl that promised much. Her voice had a new strength, and Mary was relieved to see that some of the exhaustion was gone from the Princess’ face…some, but not all. There was still a lifetime of tension in her expression, enough that even Celestia’s famed composure couldn’t completely erase it from the corners of her mouth. “For now, little pony, there’s something I need to finish. A certain purple alicorn needs to learn one last lesson…whether she wants to or not.”

“Cough…shit, yeah. Go off, Princess.” Though they were both running on fumes, Mary wouldn’t have bet against Celestia in the conflict to come, no matter what form it took. She almost felt sorry for Twilight…almost, but not really. Despite the shattering trauma the young alicorn had suffered in the past, attempted murder could not be so easily swept aside. There was about to be a goddamned reckoning, and Mary was all the way down.

Fuck that little fizzy-pop tyrant. This wasn’t over yet, not by a damn sight.

Celestia wheeled over the small island, banking toward the beach where destiny awaited. Mary was impressed at how natural their flight felt — if she didn’t know any better, she wouldn’t have guessed that they were being held aloft by wishes and will alone. It spoke to the Princess’ expert spell casting and fanatical control in the face of extreme pressure, becoming just one more reason why the doctor could no longer deny her feelings for the eccentric alien creature.

Mary had never been in love before…not really. She’d had some crushes, and she even thought she knew what true love was at certain points in her life, but those instances faded into darkness before Celestia’s glorious sunrise. She could only hope the Princess felt the same.

They’d have to have a nice, long talk, interspersed with frantic bouts of anal, when all this was over…assuming they were still alive, which had just become a much more reasonable presumption.

Mary could see the oceanfront now. The sparkling motes of salt crystal made the landscape look as though she’d gone in the opposite direction, drawing starry formations reflecting the red nebula of sunset against brilliant sands that might have spilled from the basin of the Milky Way. And in the midst of such magnificence was the small figure of Twilight, looking up at their approach with an infuriatingly relaxed posture. If she was surprised or disappointed by her foes’ miraculous return, it didn’t show.

Twilight watched as Celestia made her landing on the wide beach, kicking up gouts of sand as she trotted to a stop, her hooves digging in deep to stop her motion. The cessation of velocity felt almost as strange to Mary as the unnerving way the Princess’ wings shrank to their usual size, but she was glad for such a long-awaited dose of stability. She slid off Celestia’s back, floating down to the cool earth cradled in a mystical cocoon of feather-lightness.

Mary could still barely move — the magical transfer had taken more out of her than she expected — but the doctor forced herself to at least sit upright, not wanting to miss what was coming for anything in the world. “Hey,” she called.

Celestia turned her head toward the doctor.

There was a lot Mary wanted to say, but she settled on what was foremost in her thoughts. “Don’t die.”

The Princess’ gentle smile, as unguarded and genuine as Mary had ever seen, was the sun after a storm. “That’s the plan, little pony. Now, stay there. I’ll be done in a moment.”

And she turned away, walking along the lonely beach toward Twilight.

Master and student squared up, posturing like territorial wolves as each carefully approached the other, watching for the slightest hint of weakness. The sun was dipping below the horizon, and the sacred darkness of the ocean conjured up nameless fears from the depths of Mary’s primal mind, yet she knew that nothing beneath the waves or above it could stop this pair of demigods from doing what they came here to do. This was a battle of blood, salt and semen, inevitable as the turning of the world…except it felt like the world stopped to watch, too.

Celestia’s monstrous cock was a thick lance three feet long, as hard and dangerous as forged steel, and Mary noticed how easy her movement was with such a weapon between her legs. This was not the first time the Princess had used her royal pride as an engine of war, and from the throbbing and rumbling of her massive balls, she’d missed the good old days. Twilight gazed at Celestia’s mighty piece with an expression that was equal parts disgust and admiration as the two went round and round.

“You’ve gotten stronger.” Even Mary could hear Twilight’s note of grudging respect.

Celestia didn’t respond straight away, but her cock lurched and released a spurt of precome that sizzled as it hit the cooling sands. The older alicorn tilted her head as she listened to a different sound, reacting with a mirthless smile to a certain insidious voice.

Twilight frowned at the strange motion. “I’m sorry. Am I bothering you? Did you hear what I-“

“You tried to kill Mary.” It was a simple statement, said simply. “You’ve exceeded our…my expectations, Twilight.”

“I’ve been doing that my whole life. Although in this case, I was only putting into practice what you taught me.” Twilight’s voice rose a few octaves, and now she sounded hundreds of years younger and more naive. “Use your enemies’ assumptions against them. Play up perceived weaknesses, and hide your true strength until the critical moment.”

The slight twitch in Celestia’s cheek was the only sign that she was affected by Twilight’s childish tone. “I never wanted to make you an enemy, but I suppose we’re well past that now. I’m going to fuck you until you love me again, Twilight. And then, I’m going to stop all of this.” Celestia gestured with her horn at the sodium chloride crystals doing their deadly work along the shore. “If you truly want to understand what it’s like to force your will upon another, I’ll show you.” The Princess let out a low chuckle. “Or maybe I should say…I’ll remind you.”

A spasm of rage passed over Twilight’s face, but it quickly faded as the young alicorn ignored the weak bait. “Whenever you’re ready,” she said through gritted teeth.

Then, she waved a hoof toward Celestia’s fat cock. “But I must admit, you have me at a disadvantage. The great Sun Princess wouldn’t want to be unfair, would she?”

“Do not give that bitch a dick!”

The words flew out of Mary’s mouth unbidden, but she didn’t care. Celestia wouldn’t fall for this obvious trap, would she? This wasn’t fencing at the Olympics, it was a battle for the fate of the world! Use a Glock if you have to! Dual wield that shit! Fuck fair!

Mary wanted to say all this, but the exertion of her outburst drained the rest of the energy from her, allowing only an annoyed groan. Celestia ignored the doctor, only nodding as her horn lit up the night.

Twilight winced, and she looked down at the new length between her thighs. Instead of something like her previous size, she had been granted an exact replica of Celestia’s own cock, except colored a mottled purple with dark blue spots. It was comically big on her smaller body, with the tip extending past her front legs, but she seemed to know how to sling the massive instrument as she walked a few paces, at the same time getting used to the extreme weight and balance of the massive indigo balls hanging almost to the sand.

Celestia’s glow faded, and the night rushed in once again. “There. Now, then.”

The only warning was a deep, rumbling growl from the depths of the Princess’ graceful throat before she pounced upon Twilight like a panther on prey.

Caught flat-footed by Celestia’s sudden attack, Twilight tried to dodge out of the way, but she was far too slow. The Princess slammed her former student down hard onto her back, with the impact stealing the wind from her lungs. Pressing the advantage, Celestia climbed atop her opponent’s short thighs, shoving a gold-shod hoof against Twilight’s neck as she bit down hard against the tip of the young alicorn’s sensitive prick, making her cry out in pained anger. And yet, Twilight's purple balls lurched as a spray of precome launched from her cock over her shoulder, befouling the tide-soaked sands behind her. There was a thin line between ecstasy and agony, and Celestia knew how to play it like a violin string.

Mary couldn’t help feeling a glimmer of pride. She really did learn!

Twilight tried to break free, but Celestia held on with just the right amount of leverage. The distraction of erotic pain gave the Princess enough time to line her cock up against Twilight’s twitching, upturned asshole, and the young legend’s entire body spasmed as Celestia began to force her meat into that resisting, inexperienced orifice.

Celestia removed her teeth from Twilight’s cock as she bent down to her foe’s snarling face, enjoying her struggles as she kept pressure under the chin with a sure hoof. “At last. I finally get to sample my Faithful Student’s precious anus. You have no idea how long I’ve been waiting…dreaming about this tight little hole, wondering night after night how it would feel wrapped around my thick cock. Fuck…it’s even better than I imagined. Whatever exercises you’ve been doing to keep your rear so…compact have been working wonders.”

“Don’t…call me that! Don’t you dare! You no longer have the right!” Her youthful voice was strident as she fought against the unnatural strength holding her down. “You should never have influence over another pony for as long as you live!”

Celestia did not deny a thing. “If that’s what you think, then try to stop me. Be the heroine everyone thinks you are. Or have you given all that up, too?”

Slowly, methodically, Celestia began to work her cock into Twilight’s rear entrance, stretching it with steady force until the flat head of her prick popped into the narrow channel, causing the younger alicorn to scream and flail wildly.

“Fuck…oh, my Faithful Student. Take my fat dick. Nnnn…yeah, good pony. Good, good pony. You know what this asshole is for, don’t you? It’s for taking big cocks like mine. Normally, alicorns like us can go either way, but you…you like it from the bottom, don’t you? My word, I’ve never tasted such natural born rapebait in all my years. Nnnfff…no, don’t try to push me out. You’re going to take all this dick, until my balls hunch up against your cute little butt and inject you with 300 years’ worth of spunk. That’s the kind of pony you are, Twilight.”

Celestia’s serpentine tongue uncoiled and stole a drop of sweat from Twilight’s cheek. “That’s the kind of pony I made you.”

Twilight roared as she strained every muscle in her body to buck herself off the ground, making Celestia lose her grip just long enough to land a double-hooved kick to the Princess’ barrel, knocking her away and extracting the head of that fat cock from her asshole with a loud pop. Celestia brought herself upright in a flash, but Twilight was hot on top of her, and soon Mary was watching in disbelief as the two prideful creatures wrestled like feral beasts coupling in the surf, snapping and growling as they kicked up explosions of sand and seawater that could likely be seen from orbit.

Not a quantum of light shone from either horn. This wasn’t the kind of problem that could be solved with magic. It was a battle for dominance in the purest, most literal sense of the term, a desperate conflict where the loser would find themselves enslaved, forced to become a snug hole under the winner’s conquering prick. The pure savagery of the alicorns’ struggle as they tumbled across the beach, knocking over salt plinths that silently regenerated as they passed, shocked Mary as much as it excited her. Twisting like angry snakes, each tried to fuck the other into submission, and for a while it was impossible to tell who had the upper hoof.

But if Twilight made the first mistake, Celestia committed the second. The Princess was not used to trying to immobilize an opponent so low to the ground, and Twilight made the most of this as she slipped underneath the older alicorn, flipping her onto her back with a quick shift of her balance. Before Celestia could regain her bearings, the legend got her foe onto her belly, and she went for a mount, climbing atop that fat ass while twisting their rear legs together in a nigh unbreakable joint lock. The Princess’ wide buttocks naturally curved upward, ready for penetration.

Despite the adverse outcome, Mary was impressed. It looked like the whole MMA training thing had some truth to it.

“It’s all so clear to me now,” Twilight hissed as she hot-dogged her big cock between Celestia’s massive flanks, anticipating the wonders to come. “This whole time…everything you did, every manipulation or familial thought you ever put into my accepting little head. Even the stupid poison joke. It was all so one day, I would finally lose it and f…f…fff…fuck you like you deserve! Like you’ve always deserved!”

Celestia craned her neck to give a doggy-style look back, fixing Twilight with a defiant sneer. “Interesting hypothesis. Only one way to test it…but be warned, Faithful Student. Many have tried. And frankly, I don’t think you have the balls to fuck the bitch out of me.” She flexed her haunches, making the thick booty clap against Twilight’s purple truncheon. “You think you know how to use that thing? Silly little pony. Why don’t you stop now, before you embarrass yourself?”

As they sparred, Mary saw that the tide was going out again…way out, farther than normal, revealing the hidden shelf of coral and undersea muck closest to the beach. But she was scarcely able to consider this detail before Twilight’s moans demanded her attention.

The young alicorn was rutting against Celestia’s ass, sinking her cock further into the snowy cheeks until the flat tip at last kissed the clasping star of the Princess’ anus. Celestia jerked and writhed as she tried to throw off her attacker, but Twilight kept a sure hold while her pert, purple bottom jabbed and thrust downward, forcing her massive cock against that hole with ever increasing fervor until, with a juicy schlup, the first third of her prick sank into Celestia’s suddenly stretched-out rectum.

“Oh…oh, fuck! I can feel your soft membranes…so sticky against my…Nnnn! What is this? It’s so…so good! So sweet! I need it! I have to take it!” It was like Twilight was trying to fit her entire body inside Celestia’s succulent asshole as she took her pleasure, forcing every delicious inch of herself as deep as she could reach. Mary could only pant in sympathy, having had first-hand experience with the effect of the Princess’ colon on an unsuspecting cock.

Celestia reached behind herself, grabbing one fat flank in each hoof and spreading her pale cheeks wide, showing herself off as her own mighty prick dug deeper into the sand with each frantic slam of the alicorn taking her. “If this is an ass-fucking, I’m still a virgin. Are you afraid of it? Understandable, really. This pretty hole has driven ponies much more motivated than you out of their minds. They couldn’t take the heat…the pressure. They all came as soon as they got the barest taste. How long do you think you’ll last, Faithful Student?”

“I’m going to fuck you into the Earth’s core!” Twilight screamed into the night as another foot sank home into Celestia’s rear, then she pulled back and slammed in again, over and over, settling into a savage breeding rhythm that made the Princess’ buttocks wobble like jelly as they were clapped red by big, candy-colored nuts. ”I’m going to fuck you until you love me! Your ass is mine! Your smart mouth, your skinny horn, your ridiculous mane…it's all mine! Mine!”

There was a strange tension in the air, beyond the obvious. Mary couldn’t hear any birds, or insects, or any other animals. Even the sounds of the sea were muted, as if the old gods were holding their breath, waiting to pass judgment on the participants of this titanic showdown. The tide had still not come in, and a crawling sensation raised the hackles on Mary’s neck. Something was coming…something big, something menacing.

“Nnff…nnff…nnff…soon…soon I’m gonna show you what being a slave is like, Celestia! You think you’ll enjoy it? You think you’ll manipulate me into letting you go? If you believe that, you really are…nnn…so tight…gonna fill your fat bottom with my seed! Gonna keep you stuffed with my come for the rest of your life! Ohhh…I have such plans…nnnfff…but your ass…so hot…so good!”

Twilight didn’t notice right away, but Mary did. Celestia certainly did. Yet the young alicorn pressed on with her anal invasion, slapping her fat nuts against the Princess’ wide-open rear until she could finally, finally feel the tears rolling down her cheeks, falling into the cleft of Celestia’s ass and pooling between their straining thighs.

Twilight put a hoof to her face in wonder, even as her hips kept up their wild motion. “What…is this? What did you do to me? This ache in my stomach…and in my crotch……so…so hungry! Why can’t I stop? What did you do, Celestia?”

Mary saw Celestia’s balls start to tremble, and the older alicorn sighed at the familiar sensations as she turned away from Twilight, staring out into the cold, unfathomable ocean. “I’ve given you my final lecture, Twilight. It’s an apology…and a warning. It’s a deadly weapon, and an offer of truce.”

Celestia’s eyes shone as she turned back to face her former student, who was beginning to panic and whine at the intensity of the urges roiling her body. “It’s a gift I wouldn’t give to my worst enemy, but you’ll need it in order to become what you were meant to be. This, my dear, dear little pony…is one percent.”

Twilight’s expression was maddened. “You lie! That is a lie! This is impossible! You can’t live this way…it’s a waking nightmare! You’d have to be insane!” She screeched as Celestia began to work her interior muscles. “Stop! Please! I can’t take this!”

“You can, and you will. Five percent.”

Twilight began to gibber, and saliva flew from her slack jaws as she humped like a monkey against Celestia’s ass, barely holding onto her sanity as her body betrayed her. “Nooo! I can’t! I’m going to die!”

“You won’t. You were my student, after all. Ten percent.”

Against the foreground of Twilight’s dissolution, Mary spied a black wall of water on the ocean horizon that was getting closer every second, growing taller and taller until it blotted out the stars, and a hazy roar entered the doctor’s ears. But somehow, this calamity seemed secondary to what was happening right in front of her.

Mary’s new understanding made her feel like she’d never known anything at all.

Celestia’s lust was an awesome power. It was a force that even the most talented alicorn in hundreds of years was utterly helpless against. A mere ten percent of it — fifteen, now — had the vanquished Twilight grunting like a primitive beast, caring for nothing except the feel of a tight asshole around her cock and the drive to empty her full nuts. Celestia gazed at her former charge with the sympathetic face of a goddess, knowing that this lesson would be engraved upon Twilight’s soul forever. Because now, they all knew the truth.

That truth was this: though Celestia’s passions were strong, there was a power greater still.

It was the power needed for an alicorn to compartmentalize twisting manias that would drive other ponies to tears, making the act look like the most natural thing in the world. It was the power required to deal with affairs of state and calamities of every scope with perfect grace, even when one’s most basic needs were screaming for release. It was the power that had guided Celestia for a thousand years, and would for as many more as needed, until Canterlot’s eternal beauty had been assured.

That power was love. Only that, but it was more than enough.

“I love you,” Celestia said to Twilight, although the young alicorn was beyond hearing. “And I love you, Dr. Mary Parvotti. I love my ponies, every one, and I love my kingdom. If it wasn’t for that love, all would have been consumed within my flames long ago, but I’ll never let that happen. I know that such burning ardor is dangerous...and wild…and maybe I don’t deserve to hold the beautiful, pure jewel that is Canterlot in my hooves, but it is mine to safeguard, and I shall. I can do nothing less for those I love.”

The low roar was now deafening, but Mary scarcely noticed the skyscraper-sized wave that was about to engulf them. Twilight’s broken wail heralded her coming, and spurts of tacky cream splattered from around Celestia’s sucking asshole, combining with the Princess’ own emissions as her pearlescent balls emptied underneath them both. And as the dark curtain fell upon all, Mary’s only wish was that she might have lived to see a more completed version of Twilight, one as brilliant as the original, yet imbued with Celestia’s unyielding love.

What a perfectly beautiful heroine that would be.