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delirious-donna · 4 months

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Demon In The Mirror [Sebastian Michaelis]

an: this is a rework of an old fic for a different character/fandom. I liked this fic idea and lovely Sebby really fit it, or at least I think so! I've been hyperfixated on the world's best butler so this scratched an itch for me.

pairing: Sebastian Michaelis x female reader

warnings: canon Sebastian, mirror sex, rough touching, praise, light degradation, biting, mark marking, dirty talk, pussy fingering, overstimulation, unprotected sex, mentions of blood (tiny)

Masterlist

A mirror–polished and unassuming as it stood in the corner of the room. It never lied, never hid the truth behind a veil of deceit. All it could do was reflect what it hungrily absorbed.

Truth laid bare for all who peered into its depths. The reflection of not only your physical reactions–the jerk of your limbs, soft quiver of your stomach–but your emotions poured into the surface and were somehow magnified back. Magic, perhaps?

On its own, the mirror was a beautiful thing, decoratively ornate and standing on claw feet. You gazed into it every morning to peruse your outfit and ensure your hair was coiffed exactly as intended. However, when you added what was showing on the calm surface at this moment, the mirror became a truly magnificent beast.

Two bodies entwined in a lover’s embrace.

Every detail was laid bare in exquisite detail, and this outcome was entirely your doing. Slender fingers with midnight nails flexed deliberately into your jaw, testing the strength you had long known against the delicate frame of your mortal body. The angle forced you to stare straight ahead, to witness what was happening to you in such clarity it stole the little air remaining from your lungs.

“You wanted this, did you not?” He lilted with an air of amusement that curled your toes. “I believe you were rather forthright with your desires this evening, at least you were once I coaxed them out of you.”

Sebastian Michaelis, the head butler and right-hand man to your father was a demon. As the eldest daughter in the family and well into your twenties, you were an anomaly to your father. He would have married you off years ago if it weren’t for your ability to chase away every suitor that called. The only person who had been able to get close to you was Sebastian if you could even call him a person. Except, you liked that he wasn’t human—humans were boring.

You cared not for whatever mysterious and demonic bond had been formed between him and your father. All that mattered was that he saw the real you beneath the prickly exterior you presented to the world. It had taken many months of flirtatious glances, heated whispers promising you all manner of carnal pleasure and touches that only grew in intimacy, but you considered Sebastian to be your lover for close to half a year now.

The only problem… he treated you with kid gloves.

“Sebastian… You know, it would be okay if you held me a bit tighter. If you wish to, that is.”

That was what had started it all, the words that led to this path of twisted pleasure.

You recalled the delicate touch of white-gloved fingers, how they curled around your biceps to draw you into his lap. His carefully fastened tie and top buttons were messily undone by your hasty fingers and his midnight hair was just the tiniest bit dishevelled from where you had brushed through it.

The demon gently pawing at you was more than capable of tearing people apart with his hands, the white of his gloves rarely soiled by the crimson remnants of the deaths he bestowed, and yet he held you as if you were fine china. Didn’t he know that the times you bore witness to his feats of strength had resulted in ruined undergarments beneath your gown? He was a sight to behold, tall and lithe with a presence that demanded respect despite being a servant by occupation. What you wouldn’t give for him to direct some of that power and strength towards you, on those intimate late-night visits to your quarters.

“But, my dear, you are so soft. I wouldn’t wish to hurt you.” The sentiment was huffed into the sweet crook of your neck, his warm breath fanning across your skin whilst he smeared lazy, wet kisses to your jaw and the pulse hammering beneath the surface. It sounded almost bemused, and that irritated you.

You were no porcelain doll only to be taken out when it suited and arranged delicately upon pristine sheets. You were no silly girl. You were a woman, goddammit, and you wished above all else to be treated as such. Apparently, your expression gave away your frustration, either that or Sebastion was simply well-tuned to the emotions swirling in your complex mind.

“Have I said something wrong, darling girl?”

With today’s gown laid neatly atop your dresser, the petticoats beneath bunched around your thighs and hips, you sat back on your haunches to glower at him. His finger idled with the lace fastens of your bodice, doing little to stop you from moving away from his embrace.

A petulant huff passed your lips, arms folded across your chest, and his easy smile dimmed in response. It should have been your first warning, but ire had a way of dulling your senses to danger.

“I will remind you that I am not made of glass, nor will I break if you…” The remaining words of your tirade seemed to become stuck in the back of your throat as your gaze met with Sebastian’s. The subtle carmine of his irises caught fire, glowing coals of ember that spoke of something… unknown? Worryingly unknown.

Maybe you had misspoken, your tone a little more harsh than you intended but it was too late to remedy. Your shoulders sagged, your body deflating rapidly from the hot air that filled you only moments ago.

The room charged with electricity, you could feel it press atop your head like a physical manifestation of a weight trying to crush you against your bedspread. Something was most assuredly wrong and it wouldn’t be long before you found out the consequences of your little outburst.

“If I what?” he hissed from between gritted teeth, white and gleaming.

Your eyes snapped to his face, and the stark lines of displeasure traced his cheekbones and brow. No longer were you gazing into the face of Sebastian, your lover, this was the demon that lurked beneath. The one you longed for and were going to suffer his wrath no matter if you tried to back peddle or not.

He sat up straight with a start, forcing you further back and almost tumbling you right out of his lap. A palm anchored around your wrist, tightening against the fragile tendons until they nearly popped and wrenching you forward until you were nose to nose. His breathing was harsh, your own picking up pace to match it perfectly. For a moment you thought he would speak but after many moments of staring back and forth, he pushed back and looked towards the periphery.

With a precision no man or demon should have, he caught the fingertip of his virginal white gloves between his teeth and slowly pulled each one free in turn. You squirmed watching him reveal his hands, the intricate design that you always did your best to ignore caught your attention but it was quickly stolen away.

That same hand shot forward to wrap around your hair, yanking on the length in one swift motion until your roots tugged painfully and your throat bared in front of his eyes. The breathless whine you expressed sounded truly pathetic, only matched by the arousal pooling in your underwear.

“Hm, so you won’t break if I do this?”

Sebastian reared back and bit around the slender column of your throat, not enough to break the skin but it hurt—it hurt bad enough to spark tears in your eyes. The sweep of his hot, wet tongue licked across the mark he made, tracing the indents his teeth had created along with a low grunt that sounded from the depths of his chest.

Cool, nimble fingers reached into the front of your bodice, teasing against your heated flesh before rending the garment clean in two. The noise of expensive fabric ripping thundered in the room and you gasped at the sudden chill covering your naked breasts.

It was hard to navigate the sudden flip in his demeanour, although you had all but asked for it. You braced your trembling hands over the lapels of his double-breasted jacket in an attempt to find grounding and solace, but there was none to be found. It appeared that your demon lover was bowing to your whims, you should be pleased, and yet there was a beat of trepidation in your heart. What had you let yourself in for?

As if sensing your wayward conviction, Sebastian moved with alarming ease to the edge of the bed. It was evident that your added weight meant nothing to him, and that alone made you moan into the shell of his ear.

He placed you down in a puffy cloud of your petticoats and stood to shrug out of his jacket and waistcoat but annoyingly left his shirt in place. It didn’t stop you from ogling him openly, knowing what lay beneath even if it was rare to spend the night with him completely nude.

A finger and thumb pinched into the fat of your cheeks, lifting your gaze from the blatant lust-filled staring to meet his eyes that had mellowed to a sparkling fuschia. He was so pretty, so devastatingly pretty that you clung to his wrist, blinking up at him with heat-filled cheeks.

“You will direct your eyes up here, and wherever I instruct, is that clear?”

Only when he was satisfied he had captured your attention and you had given your clear understanding did he release the grip of his fingers, settling beside you. He patted his lap in invitation and you were crawling before he could even raise a sleek black eyebrow.

Smooth palms decorated your sides, pausing to grope your breasts. Sebastian exhaled a laugh when the excess spill from your breasts squished between his splayed fingers, pebbled nipples grazing the hearts of his palms. You whined and rocked against the bulge beneath his tailored trousers, only feeding the frenzy of his wandering hands and how roughly he was exploring your smooth skin. It was a perfect storm of demonic lust and ardent excitement, the result of which resided in the pit of your stomach. You were drooling between your thighs, flushed by the thought of it and you knew he’d tease you when he discovered how wet you were.

“A needy little thing, aren’t you? Darling, surely you aren’t this desperate for my cock?” His hand was beneath the plumes of petticoats, zeroing in on your soaked panties before you could blink. Sebastian tsked whilst his finger stroked the sizeable wet stain that traced the length of your slit. “Deary me, you’re already soaked. One might think that this side of me excites you.”

Without warning, he bounced you from his knee, your feet found the plush rug by your bed but your balance was not to be trusted and you were thankful for the firm hands at your waist keeping you steady. That was until those ruthless hands were twisted in your petticoats and tugging them down your legs to pool around your twisting feet, followed by the sudden removal of the final piece of clothing.

You tried to shield your modesty–an arm slung across your breasts and a hand cupping your sex whilst stepping out of your panties when suddenly you were dwarfed by Sebastian’s taller frame. He appeared even taller than usual, though you weren’t sure if it was an illusion aided by the long shadows cast by the candles on your bedside.

A mere flick of his wrist and your hand dislodged from protecting your decency. He stepped right into your personal space to force his hand exactly where yours had once been and began to dig deeper. Your nails scrambled against the stiff white starch of his shirt, blinking up at him much too fast whilst he took no care to spread you apart with his fingers.

“A-ah, Sebastian!”

Again, he tsked you and clicked his tongue against his teeth in admonishment when a slick covered finger rose into your vision, sparking a fresh wave of heat in every inch of your body.

“Clean it off like a good girl,” he cooed, his voice dripping in honeyed sweetness that you did not trust.

This was not something you had participated in before, but you were determined to meet the challenge in his eyes and earn a sliver of praise that would bow your spine. The taste was surprisingly sweet, a little heavy on your tastebuds but you sucked the long digit between your lips and twirled your tongue around and around to better understand why Sebastian so loved to lay between your thighs and indulge.

He patted your head affectionately, lowering his hand to caress your cheek and smirked when you turned your face to press a kiss to his palm. Unknown to you his attention had snared on the standing mirror in the far corner of your bedroom, eyeing it with first curiosity and then wicked amusement.

You were uncertain why he was interested in the mirror, leaving you by the bed naked and vulnerable, to examine the gold-gilded frame and moving it with ease towards you. What on Earth..?

“What are you–?”

Sebastian cut you off, turning you roughly and sitting with you on full display for the mirror. It made you uncomfortable to see yourself this exposed, you barely looked at yourself in this state whilst bathing or dressing so to see the thick strands of lust hanging from your parted lips was jarring. A sensation writhed in your chest, a mixture of embarrassment mingling with a little pride. Your demon that stared from over your shoulder was here of his own free will, no contract or binding bid him to your side and that was an empowering thought.

He chuckled, pressing a chaste kiss to your flushed cheek. “I am merely doing what you asked of me. You wished me to hold you tighter and be used like a pretty whore for the night, so I am doing just that.”

“I didn’t say that!”

“Ah, but you may as well have, my darling. Your body speaks far more readily than your mouth and I can hear it loud and clear.”

Before he had finished speaking, his thumb found your eager little pearl, stroking around and around in maddening circles without touching it directly. Sebastian shuffled beneath you and you felt the blunt tip of his cock trace along your cunt for the first time that night.

A thread of power pulled through the length of your spine, straightening it and you knew deep down that it was his doing. Your eyes flickered to his blazing ones, biting your lip enough to cause blood to bead. A heated kiss cleaned the offending crimson from your plump bottom lip. The scene was like nothing you could ever dream of. No book or play could conjure such images. It was enough for sweat to roll from your temples and he hadn’t even slipped inside yet.

“Can you see what I see?” He cooed, stroking the curve of your jaw with his thumb.

You weren’t sure you did. Sure, you were a carnal feast for the eyes but wouldn’t any woman be in this position? Evidently, he disliked your silent uncertainty.

“A strong woman who stood against her family and chose to take a demon as a lover instead of marrying into dazzling wealth.”

Your chin rose as the words hit home, the cool ferocity of his tone enough to make you clench around nothing but air and the promise of what was to come.

“You are mine. No one else could hope to take you from me. I speak these words now and I will die by them. Mine. Do you understand?”

Nodding weakly, you watched his features twist in the reflection of the mirror. The desperate hunger and possession stoked the fires of the demon. It was at that moment that he pushed the bulging tip into your leaking cunt, pushing deeper past the tight ring of muscles with an exalted sigh of triumph. Sebastian held you still, fingers gripping the meat at your waist to prevent you from trying to run from the stretch you were sure to be experiencing.

It only took one forceful rut of his hips to sheath himself halfway, forcing your silken walls apart, to accept him as you always did. The remaining air from your lungs expired from the sudden pressure and overwhelming feeling of fullness.

Steady hands braced on the inside of your knees to prevent you from closing your thighs and it only made your whimpers sound all the more desperate. You were met with a warning growl directed into your ear, fiery pain following from the sharp teeth that tore at your shoulder until the marks were clear in the watery image in the mirror.

You blinked through tears, struggling in the clutches of a beast you had never mated with before. This was different, and you knew that when he stroked himself to the hilt in your cunt, he felt bigger, wider even, and the tip of his cock knocked painfully at your cervix.

It was near impossible to keep your eyes open, not when they were filled with unspilled tears and your head and heart were pounding from the lack of movement. Scrunching your eyes closed was natural when all you wanted to do was roll your hips and surrender to the build of friction but you couldn’t.

“Watch.” He demanded, wetting two fingers in his mouth and smacking them against your jumping clit as punishment for daring to close your eyes. “This is what you wanted and you’ll see just how rough I can be.”

Here you were. Nude and being used for pleasure. Wrapped in a strong embrace that forced you to witness what you had brought about. Expert fingers pinched at your tender nipples and rolled the taut buds between finger and thumb whilst the other hand abused your puffy clit.

Your body trembled as another orgasm neared–you had no idea what number this one was and it certainly wasn’t the first.

“Oh. Oh, fuck.”

The words tumbled out in velvet tones, eliciting a dark chuckle from Sebastian. He delighted when you cussed, knowing that your usual etiquette was entirely lost and your decency stolen away by how he fucked your pliant body.

With every new wave of pleasure, you understood more and more about the monster holding you tight and you didn’t believe you could love him any more than you did right now. He could destroy you without so much as breaking a sweat and yet he chose to hold you like this. Yes, it was rougher than ever before but you knew there was still a gentleness to his ministrations.

This demon had found a mortal interesting enough that for the first time in his long existence, he had no desire to ever see his contract fulfilled.

His pistoning hips stopped; twitching cockhead buried against your cervix and the pulsing veins that ran the length of his thick shaft throbbed for release. He had assaulted the softy tissue buried behind your clit for long enough, it was time for him to find release too.

You were witnessing the birth of a million stars–a fucking cosmos--behind your eyelids as Sebastian massaged your insides in slow, deliberate circles. Every time you found the reflection in the mirror and met his potent stare, it made you whimper and rut even harder against him.

He was close, you could feel it with every laboured breath at the nape of your marked neck.

“What a picture you make, my dear, one I would love to hang in my room. You are all blissed out and ready for me to spill. Should I cum inside or paint your pretty stomach?”

Your head fell to his shoulder, and for the first time, he let you take your eyes off the show in front of you. Instead, he narrated it to you and that was almost worse. The seductive silky smooth tone of his words heated your blood beyond the boiling point.

“Oh my... look at this thick creamy ring around my cock… I could watch your pretty pussy drool over me all day.”

With a final shove of his hips, jets of heat coated your walls and you were spared from the embarrassment of begging for him to cum inside you. Sebastian grunted into your neck, the sensation of his hot mouth on your skin and the continued lazy pumps deep in your cunt tripped you over the cliff edge and into freefall.

Boneless, panting and mind blank except for the pleasure, your dazed eyes lifted to stare at the mirror.

Hair as black as a starless sky fell over your shoulder, strong arms clinging to your midriff and a mixture of viscous arousal dripped from between your trembling thighs.

Flushed and shivering, you bit your lip at the sight—your demon in the mirror.

#delirious writes #sebastian michaelis #sebastian black butler #black butler x reader #sebastian x reader #black butler smut #sebastian michaelis smut

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