Slumber and Sin

by Buster Knutt Reborn

Rating: mature
Tags: Princess Celestia, Sex, Twilight Sparkle, Anthro, Profanity, My Little Pony: Friendship is Magic, Romance, Porn, Fetish
Length: 4987

In the dark of the night while the Solar Princess is asleep, her greatest student approaches her with a dark lust, one that's been boiling inside him for years, and one that he aims to vent.

In the dark of the night while the Solar Princess is asleep, her greatest student approaches her with a dark lust, one that's been boiling inside him for years, and one that he aims to vent.

Kinks: somnophilia (with a twist), dark confessions, psychological sexing, body worship, titfucks, mommy milkies, size difference, enormous breasts/ass/thighs/hips, oversized horsecock, messy orgasms, cum inflation.

Cover art by Kuroran.

Published 2023-09-25 03:00:00 UTC
Last updated 2023-09-25 03:00:00 UTC

Let It All Out...

The nervous little Alicorn stood stone-still in the darkness, heart thundering in his chest so hard he could've sworn it would wake her up. There was still time to back out on his plan now. Take a few steps back, slip out the door, lock it once more, and bury these desires once and for all. She'd never know he was in here and she'd never have to know. There was nothing wrong with a fantasy here and there...

But he was tired of fantasising.

He stepped forward in the darkness as lightly as he could, silently treading his way towards the bed of the slumbering Solar Princess. He could hear her gentle breaths in the still silence of the room, being a creature of such great regality that even her drawing air sounded dignified and graceful. She stirred briefly and he froze in place, again fearful that she, of such great power and history, could hear him. Could smell the panic beading up as sweat on his purple body. She relaxed again, and he continued to move forwards.

The curtains in the bedroom weren't drawn, bathing the entire scene in her sister's gorgeous moonlight, illuminating her figure as she slept. He reached the edge of the bed, standing on the balls of his feet, ready to bolt at the vaguest hint of her opening her beautiful eyes. He again weighed up his chance to walk away, to leave an innocent stallion and never come back. He was split almost entirely down the middle with a desire to flee and a desire to continue. It weighed heavily on his soul, his mind, and his heart. He felt those two needs battle inside him, unsure of which one would come out the victim.

Then the princess stirred again in her sleep, rolling over to face him, with the movement causing the bed sheets to fall away from her body and expose her enormous, full, delicious breasts. He felt his breath catch in his throat. He felt his cock harden in his pants. He felt whatever desire he had to remain an innocent stallion bleed out of him immediately. The urge had become too strong to contain, the haze of lust washing over him and purging any sense of rational thought. The sight of her bare body alone had galvanised his resolve. He had to do this. He needed to do this.

He sparked the magic up in his body, the tips of his fingers lighting up a brilliant purple, before he tapped Celestia on the neck. The spark on his skin connected with hers, soon consuming her entire body in a purple haze. Seconds ticked by as the magic did it's job, months of research into bypassing all of Celestia's protection wards and defences against sleeping assassins working away at her. All of the trust she'd poured onto him, those years of nurture, education, and protection as she'd shared all of her secrets about what spells she'd coated herself with and what their weaknesses were. She'd told him exactly how to defeat her because she truly trusted him.

Now he was about to use that trust to violate every inch of her body. The prospect of it would've made him feel sick had he been in any other frame of mind. But right then? As of that very moment?

All the thought did was make his cock throb harder.

The purple haze soon fizzled out, having done all it needed to for now. Dusk took a deep breath, eager to dive into the platter of perfection that slept before him but also eager to make sure it worked. Play it safe, test it in a way that wouldn't incriminate him should it have failed. Exhaling that deep breath and shaking his head, he spoke to his teacher.

"Princess Celestia?" he asked in a hushed voice.

She didn't respond.

"Princess Celestia?" he repeated louder.

Again, nothing.

He felt his body shake with nervousness again, almost able to taste the satisfaction he craved from her as his magic seemed to be working. He needed to perform another test, and so he reached out and gently touched her arm. He applied a small amount of pressure, and she didn't react. He repeated the action again but with more force. Again, nothing. Not a twitch, not a groan, not an inkling that she'd felt anything. Celestia had never been a light sleeper, he knew that for sure. Hundreds of years of waking up at any hour for whatever reason had robbed her of the ability to sleep through sounds. The first time he'd spoken would've woken her up if his spell hadn't worked. Everything else was overkill, making doubly sure she'd not feel a hair out of place as he continued his plan.

It had worked flawlessly. She was deafened. Her sense of touch had been removed. Her wards had been lowered and her protections were gone. She'd be completely unable to hear, feel, or even sense anything he did to her until he willingly removed those enchantments. She was completely and undeniably vulnerable.

She was completely and undeniably his.

"Celestia..." he spoke, dropping her title and speaking to the mare beneath the crown. "I love you. I love you so much..."

He reached out and gently cupped her breast, his hand coming nowhere close to encapsulating such an enormous mound of flesh. He dug his fingers in, his hand barely big enough to cover her areola, a concept which excited him beyond everything.

"I've loved you ever since I was old enough to know what love felt like," he continued, massaging and groping her titflesh with a little more vigor. "Do you want to see how much I love you?"

With a snap of his fingers, he made his pants disappear. His cock sprung free, half-hard and drooping yet nearly the size of his own thigh. He began stroking his low-hanging cock, coaxing his twitching meat to full mast and relishing every inch it grew to.

Ten inches... fifteen inches... twenty inches...

Twenty-five inches...

He felt a shiver of excitement, of pride, run through him as he reached his full size. Twenty five inches of smooth, twitching purple horsecock, thicker than his thigh and aching in front of him. He licked his lips hungrily as he stared at his oversized cock, spreading his legs and allowing his equally-oversized balls, each one the size of a volleyball. His monstrous cock and balls were drenched in sweat, both from the excitement coursing through him and from the magic he needed to use on them having a secondary effect.

"It's all so big, isn't it?" he asked his sleeping princess. "You did this to me. When you made me an Alicorn. You told me I'd get wings, get stronger, get taller... but you never mentioned this..."

He gently pressed the tip of his wombsmasher against Celestia's soft, warm cheek.

"Do you remember when you taught me how to create pocket dimensions? 'Hammerspace', you called it..." the stallion continued, idly fondling one of his titanic balls as he spoke. "I have to wear one of those dimensions as a condom all the time now. It's too big to fit into my pants... believe me, I tried. I busted zippers, I tore leggings, I wrecked my wardrobe... had to buy so many new pants because you never warned me about what it'd do to my cock..."

He began to masturbate against Celestia's face.

"Everywhere I go, I have to wear a pocket dimension as a condom, Celestia," he repeated, a genuine hint of annoyance in his quiet tone. "Since it's your fault... I think to make up for it... I'm gonna wear you as a condom tonight."

He slid his cock over her mouth, feeling the warm puffs of air from her nostrils onto his pulsating shaft. The softness of her big, plump lips was divine. He began bucking his hips back and forward across them, using his hands as a masturbation aid as he continued to rub himself against her lips.

"I stare at your mouth a lot, you know?" he continued, using every iota of his strength to pull his cock away from it. "Whenever you talk to me, or I see you talk to someone else... all I can think about are those big lips stretching around my cock. You're so big... nearly as big as a dragon... you're the only person that could take it..."

He gently pressed his fingers to her lips, massaging circles against her maw and feeling the flesh roll between his fingers.

"You did this to me... and you're the only one I'd fit inside now... so I think that..." he spoke, his voice picking up as his confidence did. "I think that means this is how it's meant to be. You gave me a cock so big that only you could take it, so that means you have to..."

He pressed his fingers harder against her mouth, using the first two to prise her jaw open. His heart skipped a beat as he felt his flesh touch the wetness of her tongue, the tip of his cock spurting pre onto Celestia's neck.

"Ah..." Dusk groaned, now drawing circles on Celestia's thick, wet tongue. "That feels amazing... your mouth feels like silk... I need to know what you taste like..."

The stallion removed his hand from his mentor's maw, instead using them to open her jaw wider. He leaned over her titanic form, connecting his mouth to hers and exploring it with his tongue. He ran it over her perfect teeth, feeling the firmness of her pearly whites as he felt the bumps, grooves, and curves of them against the tip of his overly-excited oral muscle.

He soon moved to her tongue, dwarfing his in size as he ran the flat of his over hers, only to recoil in horror as he felt her tongue return the gesture. He froze up, his heart sinking into his feet and hammering all the way down. He flicked glances at her eyes, her chest, her fingers, anything that could be used to see if she'd awoken. Seconds ticked by and nothing of the sort happened. She didn't open her eyes, didn't ball her fists, didn't do anything to suggest she'd consciously moved her tongue.

Had it responded to his kiss instinctively? Even as deep in her sleep as she was, did she still feel the desire?

"Are... are you a whore, Celestia?" Dusk asked, placing his mouth against hers and wrestling tongues once more. "Are you such a harlot that your tongue responds to kisses like these by itself?"

His cock twitched at the thought of it alone, spurting yet more glue-thick precum onto the bed Celestia lay on. Dusk continued to suckle at her tongue, almost swallowing the thing several times due to the sheer size of it. On instinct, his hands began to massage his oversized cock again, fingers soon soaked in pre as his throbbing tip continued to spurt eveywhere.

He'd been attempting to keep his cock entertained during his oral exploration, using his hands simply to keep them busy. But the excitement had gotten too much for the inexperienced stallion, the sensations proving beyond his ability to contain them. He couldn't stop his hands and he couldn't stop his orgasm, his mouth disconnecting from Celestia's with a wet click as he arched his back, hips bucking forward, and cumming all over the floor.

His load hit the floor like a spilled can of paint, slopping and splattering into a pool of itself as he continued to fire more and more of his thick, creamy cum into the carpet. He gritted his teeth, his entire body shaking through the orgasm, sweat pouring down his back in balls he could feel. His cum-hose of a cock continued to sully Celestia's room, the smell of it wafting up from the titanic load on the floor and hanging in the air like smoke.

"Ahhhh..." the femme stallion moaned, his sloshing balls finally emptying themselves and the haze of the lust surrounding him began to wear away.

He tore his hands away from his cock, staggering backwards to a nightdresser across the room from the bed and nearly collapsing against it. His cock wilted, exhausted from the strain of orgasm but continuing to drip more cum onto the floor.

"Ha..." the stallion panted. "I'm pathetic, aren't I? I've barely even touched you and I'm already exploding..."

He tried his hardest to regain his breath, his hips bucking forward on instinct in the post-orgasm haze and causing his meaty cock to flop freely, spurting more cum with every little buck. Soon, he wrested control of himself back away from his orgasm. He steadied his breathing, he refilled his lungs, he shook the pins and needles out of his legs. He'd blown a load so early into the night, but it was too early to stop. He hadn't felt the touch of her tits on his length, he hadn't drank the milk from her tits...

He hadn't emptied his love inside her fertile womb...

He shook his head, forcing himself back into the proper state of mind to continue his escapades. Whether it was through mettle or magic, he wasn't leaving this room until he'd quenched the desires of an entire puberty of lust towards his teacher. He needed this more than he needed air. Once this was done, he could bury it forever and move on after having tasted the sweet fruit he'd longed for since the day he was old enough to lust.

"Your tits, Celestia..." he grunted, forcing himself off the dresser. "I need your tits..."

The svelte stallion, still dripping sweat and cum, made his way back over to the sleeping princess, gently pulling the bedsheets off her entirely and casting them onto the floor. He took a look at her fully-exposed form, his degenerate eyes drinking in the view of her moonlit beauty for the first time. Princess Celestia was enormous, standing nearly nine feet tall when on her feet, and that titanic frame carried such a beautiful body.

The princess was overweight. There was no denying that, but all of those extra pounds found their way to the perfect places. Each breast was double the size of Dusk's head, her pudgy stomach sat just atop her wide, child-bearing hips, dropping his eyes down further to her gorgeous thighs that were as wide as his slender shoulders.

His maw and his cock drooled in unison, staining the carpet beneath him with the ichor of sin, his fingers and prick twitching desperately to get a hold of his oversized-beloved. Dusk clambered on top of the princess, her torso alone being nearly double the size of his, staring down at her sleeping grace. He paused for a moment, listening to the gentle, beautiful sound of her breathing in and out. His eyes remained locked onto her heaving tits, mouth salivating at the sight of her erect nipples.

Cadance had once jokingly mentioned that Celestia could breastfeed, part of her matronly magic to where she produced milk at all times regardless of being pregnant. What Cadance had mentioned off-handedly as a playful jab had hit Dusk with a wall of arousal so hard he'd needed to excuse himself from the meeting to masturbate over the fantasy. Ever since that day, he'd wanted nothing more than to guzzle fresh milk from the tits of his mentor and had spent the years building up the confidence to attempt seducing her.

Cowardice and lust had won out, unfortunately, and while he lacked the strength to confess to her, he possessed the dark desires needed to use his magic as the second-best choice. He reached down to her tits with his hands, fondling them between his fingers and feeling his heart hammer in his chest. The harder his ticker pounded, the harder it made his cock. His refractory period over and his desires overflowing, his prick had swollen back up to full size, resting against Celestia's beautiful belly fat and dribbling more cum into the cavern of her cleavage.

"You're so soft, Celestia..." Dusk mumbled to himself, pulling on her teats and feeling a small amount of milk jet out between his trembling fingers. "You're everything I've ever wanted... everything I've ever wanted you to be..."

Wordlessly, he slid his cock between her tits. He could feel her ancient heart beating against the base of his dick, the sensation of the softness of her breasts and the drumbeat against his flesh sending a shiver down his spine.

"I've heard stories of kings and emperors waging war for your body, Celestia..." he continued. "They took up arms against the country when you turned them down, and you destroyed every single one of them with the power and the fury of the sun..."

He leaned forward, arcing his flexible body downwards and taking one of her milk-soaked tits into his mouth. Sucking like an infant, he got his first mouthful of Celestia's delicious milk. It tasted like heaven the moment it splashed onto his tongue. His eyes almost rolled back into his head, shivers wracking his entire body as he continued to gorge himself on her bountiful breast. His hips began bucking forward, Celestia's tits being so unbelievably enormous that even a cock as obscenely huge as his barely poked out from the top of them. He slid his cock in and out of nirvana with each thrust, the sweat on his body slowly beginning to coat Celestia's as he refreshed himself with the milk he gulped down ravenously.

"Your tits are perfect," he muttered between gulps. "You're perfect... I love you so much and I'm too scared to tell you during the day..."

He picked up the pace as he fucked her tits. He watched her enormous breasts begin to jiggle with every stroke of his hips, heard the sound of all that weight clapping against his crotch as his sin-slicked cock continued to drool into her cleavage. He bit his lip, feeling himself getting closer and closer to the edge with every pump of his wide waist.

"Could I ever tell you after this?" he pondered aloud. "I think if I had to look you in the eyes, I'd cry, Celestia... you've given me everything possible, every step of the way... training, care, attention..."

He could feel the edge of orgasm rapidly approaching.

"I'd be nothing without you... without your kindness... your teachings..." Dusk strained out through gritted teeth. "You're the sole reason I am what I am, that I can do what I can do..."

He could barely hold it back.

"And how am I repaying your kindness?" Dusk asked, leaning down and preparing for another flood.

This was it...

"I'm raping you in your own bed..." he choked out, voice wracked with guilt and sounding on the verge of tears.

He finally admitted his sin to his own ears, and it made him cum harder than he'd done before in his entire life.

He unloaded all over her face, thick, steaming cum from his oversized, over-filled balls almost drowning the icon of beauty in her sleep as the tiny, pathetic stallion on top of her twitched, gasped, and spasmed throughout the entire experience. Buckets and buckets of cum slopped all over Celestia, Dusk losing his balance and toppling backwards, slopping himself with his own load as he did so. He made no attempt to catch or steady himself, landing on the pillowy softness of Celestia's thighs and merely allowing himself to sully the entire room with cum.

It splattered on the dressers behind him, it hit more spots on the floor, it slopped into Dusk's own mouth as he lay there panting, maw-wide open. He guzzled down his own sin as it coated the room around him, feeling his balls physically shrink as he unloaded every ounce of lust, guilt, and regret onto whatever happened to be in the line of fire. After what felt like an eternity, it finally came to and end. The torrent became a gush, the gush became a spurt, and the spurt became a dribble.

The whole room stank. He stank. Celestia stank. He could feel pools of his own cum seeping through his fur and into his flesh, tattooing the sensation of his own despicable actions into his skin forever. He'd never forget this feeling. The hum in his cock. The ache in his balls. The singing pleasure in his cock. The screaming guilt in his stomach. He wanted to die there and then. For his black heart to stop beating and his life to end so he wouldn't have to live with the memories of what he'd done here.

So that he'd never have to look his beloved mentor in the eyes and remember the night he invaded her privacy, violated her body, and coated her entire being in the disgusting product of his unchecked, evil desires. He wished to die for his sins... but only after he'd finished. He had one more evil to commit, one more carnal sin to add to the tally, before he'd end it all.

He sat up, his body aching and his muscles burning, and his eyes locked onto his next target... that gorgeous pussy of hers. Fat, perfectly-packed, and dripping with sublime sexuality, Dusk felt his black heart pick up once again as he devoured her cunt with his eyes. He readied himself, sliding his hands down the thick, beautiful thighs of his stained mentor and moving them aside, parting them gently and refusing to even blink as he stared at the treasure between them.

"You made me like this..." he muttered, gently stroking his cum-soaked cock as he lined it up with Celestia's gorgeous pussy. "You wanted me to be an Alicorn, you wanted me to be a King... you wanted me to be this big... so take responsibility for it, Celestia... this is all your fault."

With the head of his cock and the whole of his spine trembling, he pushed himself past her entrance and into her cove. He nearly bit a hole through his lip at the sensation of it. Something so hot, wet, and tight clamping down on his oversized cock in a way he'd never felt before. He'd been too big for mares. They were too scared to do anything more than foreplay with him for years. Celestia stole his chance at being intimate with anything else, so she had to be the replacement.

He watched her guts stretch as his cock continued to push deeper inside her, inch after inch making the bulge in her big belly all the larger. He tried to count down the inches, tried to be methodical about it, but somewhere after inch fourteen the pleasure became too much and he lost his composure. He rammed the rest of it inside her, watching her belly bulge upwards like a whale's tail from a rough ocean, and he could feel the heat of her core burning through every inch of his prick.

It felt so good it made him want to cry. Years of frustration, anger, desire, regret, lust, and love boiling over him and spilling outwards. He gritted his teeth together, screwing his eyes shut as tears began to leak from the corners. He began hammering his mentor, watching her stomach deform over and over again, leaning down and lapping at her belly where it stretched, feeling the heat of his own cock radiating through Celestia's stomach.

"This is your fault!" he shouted, making the first sound over a whisper he'd made other than orgasming. "You made me like this! You forced all of this shit on me, you took away my childhood, and you turned me into a freak! You deserve this!"

He fucked her harder, feeling the burn of exertion and anger in his core.

"I should've done this years ago!" he barked, anger boiling over yet again. "The day you made me like this, you should've been on your knees for me! All the danger you put me through, all the times I risked my life because that was what you groomed me into doing! You should've been lying in my bed every time I came home to take this stupid giant cock you gave me! You're mine, you hear me?! Your ass, your tits, your pussy... all of its mine because it's the least you can do to pay me back!"

He felt the tears streaming down his chest as he continued to pound her, his balls swelling out, his massive cock throbbing harder and harder inside her. He gritted his teeth, biting back another rant as he made up his mind, finally unleashing his perfect vengeance.

"I'm gonna get you pregnant!" he snarled. "I'm gonna use this stupid cock to fuck a foal into you, and you're gonna take it! You controlled my life, you took away my freedom, and that's what I'm gonna do to you!"

He sobbed through the rant.

"Get pregnant, you manipulative cunt!" he roared, slamming his cock down to the base inside of her and blowing his final load.

He clamped his mouth down against hers as he came, his tongue stabbing into her mouth and wrestling with hers as it moved on that same instinct. He sobbed through the kiss, sobbed through the orgasm, tears streaming down his cheeks and his body shaking with a melting pot of emotions as he impregnated Celestia. He felt her gut begin to swell under him, that beautiful belly bloating and expanding like a balloon as he pumped gallon after gallon inside her.

"You... deserve... this..." he growled under his breath, pumping her fuller and fuller until he finally felt his orgasm come to an end.

Once the last drop of cum left him, his strength did too. He collapsed down onto Celestia's body, a twitching, mewling wreck of emotions as he slowly came back to his rational mind. The sense of guilt creeped back into him, the gnawing feeling of regret and self-loathing soon turning into a tidal wave of self-loathing and remorse. He tried to stop sobbing, did his best to put a clamp on his feelings of sorrow and hurt and make himself face up to what he'd done to the mare underneath him.

He'd lost all chances to call himself a victim of her, life, or any circumstances as soon as he'd made her his victim. He couldn't think about looking her in the face again. He couldn't look at himself in the mirror. The consequences of these actions would be stapled to him for the rest of his life... and there was no outrunning what he'd done here. His thoughts were awash with so many screaming voices that he could barely feel anything...

Only for all those thoughts to go silent as soon as he felt Celestia's warm, gentle hand on his back.

"There, there, my sweet prince..." came the motherly coo from between her lips. "It's all okay..."

"I... I'm sorry..." Dusk choked, sniffling quietly and trying to wipe away his tears.

Celestia sat up, cradling him in her arms against his chest, leaning down and licking away the tears from his cheek with a long, wet drag of her tongue.

"Shhh, shhhh..." she said with a gentle shake of her head. "You don't need to apologise for anything, my love. This was what we agreed on, remember?"

Dusk looked up at his mentor... his oldest friend...

His lover...

"I'm sorry for what I said," he muttered.

"Don't be," she responded. "It needed to be said. You've carried that all with you for so long. I told you this was your night to let it all out before we started."

"I feel sick..." Dusk responded meekly, cuddling closer to his oversized lover once more.

"I know, I know..." she nodded, resting his head against her collarbone. "You're okay, my love... you're more than okay."

"I didn't hurt you at all, did I?" Dusk asked.

"No, not at all," she answered with a playful giggle and a wink. "I told you not to worry about me. It would take more than an oversized cock and a rough pounding to knock my back out of whack, remember?"

Dusk chuckled quietly, a sense of relief washing over himself as he dug himself out of the headspace he'd been in for whoever-knows how long.

"I'm sorry I called you a cunt," he murmured weakly.

"Hardly the worst thing I've been called in the bedroom," Celestia smiled, gently stroking Dusk's sweat-slicked mane. "You're fine, Dusk. We're fine. Everything's okay, alright?"

"O-Okay..." he sighed.

"Do you need anything?" Celestia asked, cocking her head sideways and staring at him with a look of concern. "A drink, perhaps?"

"W-Water would be nice..." Dusk mumbled. "I'm sorry, Celestia, it's just... that was a lot. That was a lot I didn't know I was going to say when I walked in here."

"But it needed to be said," the solar Alicorn nodded along, sliding her hand over his back and gently rubbing circles against it. "This was your chance to get it out, and now that you have, we can start working through it, remember?"

"Y-Yeah, yeah..." Dusk nodded, the lids of his eyes drooping as the exertion began to take its toll on him. "That took a lot out of me."

"And put a lot into me," Celestia giggled, gently kissing him on the cheek. "Let's get you some water, and then you can have a nap. We'll talk about all of this properly in the morning, okay?"

"Alright... yeah, alright," the stallion nodded.

"Remember, I love you," Celestia smiled gently.

"I love you too, Celestia," Dusk nodded, kissing his mentor once more before the two made an effort to untangle themselves from one another...

With more than enough difficulty...