I have been thinking about this for a long while, and I wonder what would happen if the reader was the one to bite Sinister Mark, considering his darkest secret, how would he react?
Sinister Mark x Reader
!!Words Count 1k!!
!!Warnings: GN, biting, cannibalism, having a venomous man, possessive and obsessive Sinister Mark who is fixated on you and your body (your flesh), nonconsensual body mutilation, blood, a bit graphic description of flesh being eaten, trust shattering, reader is terrified, Mark being Mark!!
A.n: Sorry for taking so long with the requests damn it illness hit me and won't let go I think I'm dying lol. And fckers suddenly moved our exams which were supposed to be in mid June, to this week. Taking 3 different history exams in 3 days...puff I feel like I'm on the eve of battle. Anywayy I hope it turned out in a way you'll like,I would've wanted to go into more detail but I really don't have the time.
"Ohh..ho ho…" He tilted his head to the side, making it obvious he was enjoyed the feeling of those cold lips against the hollow of his neck. Offering you more access. But in truth, he simply didn't want the surprise brought by this unexpected newness to interrupt the moment. If you could see the eyes beneath his glasses, you would've noticed them half lidded in surprise, leaning into your touch while lost in thought. The pleasure wrapping around his body slipped from his tongue as if it had found a voice of its own. "So we're quite curious, it seems? Or was this simply a term of endearment?"
He often saw you gnaw on things to relieve stress. He'd never thought he himself would become one of those possibilities. Other than the bruises and marks left on your skin after sex, this kind of activity was nearly nonexistent between you.
And now you were making him move with smug satisfaction as he licked over his chapped lips. The moment the sweet pressure of your teeth disappeared, a sense of longing had already begun to bloom inside him. Diseased and contagious, just like his mind. Like venom seeping from the fangs of an ash colored snake, he slipped into your body before could even think to resist it.
You tried to catch his weight to keep from falling when he threw himself at you, but it was useless. Like a starving beast, his fingers dug into the flesh of your shoulders while his teeth paid an unpleasant greeting to your jugular. A cry tore from your lips, your eyes widening in shock. The force of him dragging you both to the floor only added to the pain, leaving you crushed beneath him.
The way his teeth tugged at the skin of your neck like it was a meal only deepened the panic inside you. As you struggled not to drown beneath the storm of emotions, trying to process both the pain wrapping around your body and the way his actions shattered every ounce of trust you had in him, your mind overflowed instead of emptied. Your lips could only fumble over the words. "Mark! What are you doing—stay away! Let go!"
His laugh froze you in place. It was one of those emotionless sounds that only ever left his lips for his enemies. The rhythm of your heart faltered; you could almost feel it running wild inside your chest like its skirts had been set on fire. Slowly, he dragged his teeth away from your irritated skin with a scrape.
Breathless, you shifted your eyes to the side. He looked as though he were wiping away some invisible filth from his lips, his tongue repeatedly dragging over the same spots. His head hung slightly forward, his gaze distant from you. Yet his grip on you hadn't loosened at all and even that was enough to keep you from feeling any relief.
"Now…" tour bones creaked beneath the movement. "Holding a piece of heaven in my hands and still being blind is a rather irritating thing." His voice carried the weight of a dark promise. Tugging at the fabric beneath his fingers, he exposed your shoulders to himself. Lazily slipping his tongue out, he gave the flesh before him a slow worshipful lick. A pleased hum left him as he savored the taste of your sweat. "God...you're delicious."
The wetness that pinned you in place traveled from the small hollow of your collarbone, up your neck, to your chin, then to the corner of your lips. If not for what had happened moments ago, it almost would've felt like one of your usual romantic moments of foreplay. You flinched slightly at the tip of his nose brushing against your cheek. "Mark…"
"Don't be afraid. I would never hurt you." he said, though his voice carried such a rough murmur that you couldn't tell whether it was the truth or a lie. The words sounded almost thoughtless, as though spoken without him even realizing it.
With the flow of air brushing against your cheek, you helplessly shifted your eyes elsewhere. Sweat coated the hands resting uselessly between you. You had only wanted to do something small and sweet. Just to pull some kind of reaction out of him. And now, all you could do was endure him inhaling against your cheek beneath the helplessness brought by the silence.
As if your scent soothed something raging inside him, he breathed in even deeper. Before you could sink into thoughts of what he was doing, he suddenly pulled away. Your eyes instinctively followed him with the fear of prey.
In horror, you watched Mark open his mouth wide before clamping it down against your flesh.
Pain slammed through your body, your hands barely managing to clutch at his biceps. You writhed beneath him, crying out his name and his grip only tightened. You could feel your bones crackling beneath every one of his fingertips. You didn't even see him viciously bite into the flesh near your jaw and pull back with it between his teeth. Tears flooded your eyes so heavily your lashes seemed determined to glue themselves together.
Hearing him slowly swallow your flesh piece by piece made your stomach twist. Not even the madness of your heartbeat could drown the sound out. Your bodies were pressed tightly together while the two of you drowned in completely opposite emotions.
You don't know how long the two of you stayed there like that. You wished for him to let you go but he didn't. Even while your screams damaged your vocal cords, he never showed a single sign of discomfort. The person you knew felt like a stranger. A stranger you would want to run to the end of the world just to escape from. He tried to murmur your name through broken words but moans slipped from his blood smacking lips instead. "Ah...my love...hah so everything was incomplete without you after all."
Editor: knul__ btw this my fav Sinister edit! I made this gif in 2025
- This was split into 4 chapters. One Chapter each day.
- This is my first time writing smut...
- I had paid people to proofread and help me write the smut parts-
. . . . . . . . . .
This is Sinister Mark we're talking about chat-
Of course it's fucked up.
>Fem Reader<
Warning: Smut (on Ch.4), Stockholm Syndrome, Blood, Gore, Therapy, Decapitation, Anxiety, Depression, and Death threats...
Wondering about that incident, you started to treat him nicely. "Looks like someone came to their senses." He said as he looked at you, caressing your cheek as you avoided his gaze, being flustered.
He also started to treat you nicely by bringing down delicious meals and flowers and holding you delicately; of course, you liked this, but you still had mixed feelings about him, as you still weren't over with the Mark from your dimension as it brought you raw pain.
You couldn't just easily move on from what happened after he was with you for your whole life, and the Sinister Mark in front of you could notice this feeling of yours still lingering. He despised it, and this made him want to kill his other counterpart, but then again, he should be thanking him as well as if it weren't for him leaving you behind, he wouldn't have the opportunity to claim you for himself.
But even though he had you in his possession, your heart belonged to the other Mark, which made him filled with rage and jealousy, although at least he knew that you still loved some parts of him as well, as The Mark from your dimension is almost the same as him.
He hasn't even shown you cruelty, as he made sure you were fed properly; he had done so much worse to the people in this dimension; he wonders how you'll react once you know.
You seemed obedient enough to earn yourself a free pass out of the basement, so today, he'll come down and give you a good surprise.
In the meantime, you were lying down on the mattress trying to count to one thousand to keep yourself sane from being locked up inside; you heard footsteps as you stood up, as finally, he was back.
Although it's embarrassing because he has trained you like a dog now, following his commands to receive such rewards of attention, because you were going insane from the silence of the dark and cold room in the basement.
He opened the door as he smiled; he saw you sitting, staring at him like a puppy waiting for its master; you looked at him and wondered where your meal was as he approached you.
"You are getting much more obedient these days, as a reward.." He leans toward you, closing your eyes as you thought he was going to kiss you, but you hear a metal clink. You opened your eyes as you saw the chains that bound you to the wall were removed, letting you move your leg again.
You looked at him, wondering what gimmick he was up to again as he extended his hand for you to reach, and you grabbed it. You were silent, observing him about what he was doing.
He slowly guided you outside of the basement, where you finally saw the light from the barricaded windows.
He went behind you, holding your shoulders as he whispered. "If you were a lot nicer, I wouldn't have to restrain you in the basement, but it's nice to see you're starting to know who makes the rules here." He kissed your neck as you jolted again, pulling away from him.
"Looks like you still have a lot to learn." He chuckled as he flew above you, he looked at his watch.
"I have to go somewhere, but I'll be back." He said as he flew out of the house from an opening in the ceiling that you'll never reach.
You started to walk around the house, trying to get yourself familiar with the surroundings again, jumping up and down from the excitement to see something other than the pitch-black darkness and the white mattress you slept on; you started to touch everything around you because everything felt unreal.
"I need to touch some fucking grass." You muttered as you walked upstairs to the room where you once woke up; seeing a big closet, you opened the closet to see some clothes that you'd worn from your dimension.
"I guess he kept my clothes." You mumbled as you started to take some of it and go to the bathroom to take a shower. You started to stink from not bathing for days; you got flustered again as you wondered how the Sinister Mark could still love you even though you were becoming stinky from not bathing for days.
‘How long was I in there?’ You wondered as you stepped out of the shower looking at the wall clock, seeing as it was afternoon. "I should make some food… I'm starving." You mumbled as you got dressed, going down and walking to the lovely kitchen.
You opened the fridge to see the ingredients. 'Looks like I'll have to make lunch.' You thought as you grabbed some ingredients from the fridge and cabinets, and started to open the stove.
You started cooking your favorite meal; you made two portions for you and Sinister Mark; that's what you've been calling him these days.
"Honey~ I'm home~" He yelled as he tried to find you putting lunch on the table.
"It smells good," he said, approaching the table and sitting on the chair. He smirked as he looked at you sitting on the opposite side of the table.
"You look hot when you wear that apron." He looked at you, smirking wildly; you stood silent as you avoided his gaze being flustered.
"This man is insane." You mumbled quietly. "I heard that; you made me like this, sweetheart." He said as he flew next to you as he breathed your scent in again.
You jolted as you quickly moved away. "I- please stop doing that." You pleaded as he looked at you. "I don't want to. You always smell good." He said
"Can we please eat? It's been a while since we ate together." You pleaded again to shift the topic to eating food because it has been a while since you've had actual meals.
He hums in agreement as he goes back to his seat; as you go back to yours, you drool at the smell of your own cooked meal as you grab a spoon, trying to eat it all up.
He looked at you as you ate; he was slowly chewing the food you made. He was smiling menacingly across you, feeling his gaze. You started to feel nervous about this, but you were hungrier so you tried to avoid this feeling as you kept stuffing your mouth with food.
He chuckles. "Don't bite more than you can chew, sweetheart." He said as you looked at him, face stuffed, looking like a squirrel stuffing their face. He stood up from his seat as he slowly approached you again.
You were startled at his movement. 'Is he going to lick me again?' You thought as he leaned in closer to your face, licking the crumbs off your face, feeling his saliva on your mouth. "Why do you keep licking me?" You finally asked as you wiped the saliva from your mouth. "Because you taste good." He replied.
At this point, this was normal for you; from the amount of times he had licked you on your face, you started to think he was a dog. You wonder if you could also manipulate him. He's already in front of you, needy for your attention as he waits for your love and affection.
But you question yourself if you did that. Would that be right?
After eating, you picked off the plates and placed them in the dishwasher.
Mark had gone up to change clothes; after he went out of the house, you stretched your arms as you yawned, satisfied with the meal you just ate. He crept behind you, putting his chin on your shoulder.
"I want to show you a surprise." He whispered as he kissed your neck again, you faced him as he led the way, to a huge door behind the house, he opened the door and it led you to a beautiful garden, it had been a while since you saw grass as you started to walk outside you crouched down to touch it.
As you looked around, you saw walls higher than you; it surrounded the garden, a means to keep you inside while you enjoyed seeing beautiful flowers.
"Do you like it?" He asked, as you looked at the flowers again. It was beautiful. "They’re artificial flowers. I don't know if you have allergies in your dimension, so I did this just in case you do." He explained you looked at him and at the flowers; you softly smiled as he gifted you a beautiful garden.
"I love it." You replied, as he went beyond and got you a beautiful garden, a gift that everyone would be amazed at.
You stood up again as he took your hand, holding it, as he dragged you to a little cottage with some seats. There was also a pond there, as you looked at the KOI fishes swimming around.
He gave you fish feed to give the fishes; smiling with joy, you took the fish feed from his hand and started to give the fishes some food to feed.
"You look beautiful." He whispered, as you got flustered, still ignoring his flirtatious behavior. "I could keep you locked up here for centuries." He added as he touched your hair, kissing the strands.
You slowly looked at him without moving. You saw him, Mark, not the one from your dimension for once, but the Mark that's with you right now; he looks at you like he's a man craving for you, craving for your love and attention; you wondered how he got this insane in this universe.
Was it really you that did this to him? You asked yourself. "You can take a picture. It'll last longer." He chuckles as you shift your gaze back to the fish.
"I fucking hate him." He cursed as you looked at him, curious at what he meant. "I hate that other version of me; he won't leave your mind, won't he?" He looked at you.
"I want to strangle him; I want to strangle him in front of you. So you'll know there's no one you could rely on, only me and me alone; I'm the only one who can have you." He said as he hugged you, pulling you to his chest; you didn't move. But your heart started to pound rapidly; you didn't know if it was fear or affection toward him.
"What can I do to get your love and attention?" He asked as you stayed quiet because you were uncertain. And this quietness made him furious; he pulled away from your touch as he flew inside, changing into his super suit and flying away.
Your heart ached; you were sad because you couldn't make a decision. You sighed as you went inside the house again; closing the doors from the garden, you walked up the stairs, trying to remove the sadness from your mind. You looked at each and different rooms, trying to see what was inside of them, looking at the contents carefully in each room.
When you opened one of the rooms, you noticed the scattered clothes on the floor; it was Mark's clothes he recently took off as he flew away.
You didn't pick it up as you didn't want him to know that you entered his room, but as you looked around his room you saw another door, on the corner of the room, and it wasn't present in any other rooms.
You slowly approached the room, as it was locked. It needed a passcode to open it, and heck, curiosity killed the cat because you wanted to know more of the Mark that held you captive in his feverish dream.
You tried opening the lock with every passcode you had in mind, birthdays, anniversaries and even achievement.
You sighed as it all wasn't working, but at the corner of your eye, you saw a photo frame, and it contained a photo of you and Mark; you opened the picture frame hoping for the passcode to be stored inside of it.
And it did; you looked at the numbers as you typed it in the lock, the door opened, as you dropped the photo frame in shock seeing the sight in front of you.
You saw a decapitated head, and it was yours and another man's. You started to back away from the door as you bumped into something. You looked up as you saw him.
"You're not supposed to be in here." He angrily said as he grabbed you, throwing you onto his shoulders.
"S-stop! I'm sorry! Please, not the basement!" You pleaded, as he wasn't listening. "Please, I just want to know you better." You explained as he stopped from moving; you tried to anticipate what he was going to do next, as he placed you down on the ground.
"You happy? Did you see what you wanted to see? Now you know what will happen if you try to leave me." He said as you tried to walk slowly back from him.
"That was the man who you left me to be with. He was so fucking pathetic that he took a shit before he died." He clenched his teeth as he stopped moving; he suddenly punched the wall, as that wall shattered into pieces.
He started to laugh again as tears fell down his eyes, crying from the insanity which you had caused after leaving him behind, leaving him to be with another man.
You felt guilty and sad for him, that you caused him to be like this, you made him like this. This is what you felt when your Mark left you.
You started shaking as you slowly approached him, hugging him as you also cried. He shaking as he hugged you back as well as he slowly smiled.
Warning: Mentions of cannibalism, kidnapping, and blood
You could feel him, the way his teeth grazed your skin, tongue licking up any blood that spilled from your wounds, wounds that he caused. His Breath hitting your neck before the sharpness of his teeth chomped down.
“Mmh Ah- Fuck your so fucking delicious..”
You wanted to run, scream, anything to get away from his touch, to get away from him. Instead his hands hooked themselves on to yours interlacing them in a harsh grip “So warm, I could eat you for days“ his voice rung with pleasure, almost gleeful from the way you turned your head away from him, he could hear the way your heart was beating, so fast, so loud, you must really love him. “Ive almost forgotten how you taste..”
Three days with out him, three days were you spent your time in a locked room away from anyones gaze. You doubt anyone even knew you where here, hell anyone who probably did was already decaying underneath the city rubble.
“You seem tense..” His lips grazed your’s, you could feel his smirk “why not take a walk outside?”
The crackle that imitated from his throat did nothing as your eyes fell to your thigh’s.
“Oh!- Oh my bad, I completely forgot-“ his hand ran down to your knee “-You would need legs for that wouldn’t you?”
You tried to run away once, breaking down the door till your own shoulder popped out of place from slamming your self against it, the way the air shifted to what you had once forgotten, hope in your lungs.
Of course nothing nice ever lasts long.
He had found you, watching from up above, arms crossed over his chest, smile wide, finding it amusing how your once hopeful face sifted into something else.
It must be love, why else would you look at him like that? Fire in your eyes, the way your heart quicken- even by the smallest fracture, It has to be love, what else could it be?
He made sure that wouldn’t happen again.
“You should have just stayed put like I told you.” Your eyes refused to look at him, even when his teeth ripped apart your flesh from your shoulder “You would still have your pretty legs if you did..”
“Of course they’ll grow back” he mused tongue taking another lap over the blood, watching as it slowly stated putting each other back together.
“But like always-“ you hissed at the sudden grip on your throat, your eyes harsh as he forced you to look at him. “-Ill make sure to eat them up~”
{ wanted to make this longer but ran out of creative juices 😔}
What do you think is each Mark Variants’ favorite sex position?
Invincible Variants favorite positions
Hey Nerds, you dont wanna know what my search history looks like making this. Some of these have the dumbest names, but thats what the site calls them.
I think my package is getting here tomorrow, so im excited.
Enjoy
Sinister Mark
The kind where you got him face down against something, gripping the back of his neck like some kinda rapid dog, so you can use the grip to thrust into him.
Or the one called the wheelbarrow.
High-top Mark
Literally any position where you can tie him up.
Or, ones where you get to abuse his flexibility as much as possible.
Prisoner Mark
Missionary, with loving eye contact
That one where he's sitting with his back against your chest, and you can hold around his torso and kiss his neck and stuff.
20/20 or lensless Mark
Missionary, but with the most feral nasty eye contact. Even better if you choke him or spit in his mouth.
Would go crazy in a full nelson if you can lift him.
Flaxan Mark
Cowgirl, just let him ride you.
Would also enjoy some missionary, but against the wall.
Mohawk Mark
Would literally like all positions, places and times. He just wants to get railed and laid.
Long Hair Mark
Doggy, so you can grab his hair and pull it.
Kind of a mating press, but where he can do autofellatio, cuz he thinks its really hot and embarrassing.
Bug eye Mark
That one where hes laying down and you got your arm hooked around his throat, so you can really rut into him.
Just likes the ones where he just needs to push his pants down his thighs so you can get access.
Half mask Mark
When you straddle his face and fuck his throat, like, him lying on his back with you above him.
69, especially likes doing it flying so you are standing and he's upside down.
Maskless Mark
Kneeling at the end up the bed, back arching very pretty, so you just need to bend your knees a little to get access.
Any position where you guys can kiss tbh. Loves holding hands as well.
Full Mask Mark
Spooning, especially after you guys have just woken up or you are about to fall asleep.
Likes sitting in your lap, especially when you are “busy”, aka just acting like you are but it makes him happy.
Moustache Mark
Bending over a counter or the couch, or anything. If he's wearing panties, then anything where you can just pull them to the side.
Likes riding you too, but always ends up a bit too into it, making your hips hurt.
Shiesty Mark
Literally any position, what wouldnt he be into?
Big sucker for a mating press or good ol “wrestling moves”
Omni-Mark
Bent over the counter or couch, but the kind where you lift one of his legs and put the knee on the table so you can take him from the back.
Likes kneeling when no one else is around and just having his mouth on you.
Viltrumite Mark
Any position where hes like “below” you in a way, like doggy or him just kinda bent in half, with his hands and face on the floor, and his hips in your lap.
Likes kneeling and being tied up, arms behind his back and legs folded in half and tied up.
Bulletproof Mark
Laying on his back with his arms above his head, but bent so his armpits are like, exposed, cuz he likes body worship.
This goes hand in hand with the one above, but after hes been massaged all over and is all shiny with oil, spread his legs and just drag him down the bed so you can stand at the end.
Faceless Mark
That one where hes sitting with his chest against the back of a chair, with his fits hanging off the edge of the chair, so you can milk him with both hands.
Spooning position, or just laying on your sides in general with his leg lifted in the air.
Empire Mark
Any position where you can choke or spank him, like doggy or misionary.
Mating press, please put him in one of these.
The cuck chair,,, he likes to watch and get the sloppy seconds.
Original Marks (OCs)
Cyborg Mark
Frotting or dry humping cuz hes still embarrassed about his body.
Thigh fucking, may or may not have made the insides of his thighs a softer squishier material so you guys can do this.
Evil emperor Mark
Roughest rider you have ever met, will throw his weight around, makes you think hes cracked your hips when hes done.
By extension, amazonian position. Will sometimes very rarely do doggy, but most of the time likes being in control.
Viltrumites are actually alien Mark
Him on all fours with you placing a container or bucket under him so you can milk his eggs into it,,, his eyes go all blurry and he will start drooling a massive puddle.
Somehow always ends up putting you in a mating press when hes kinda egg crazy. But when hes not, then he enjoys good ol missionary.
Tiger Hybrid Mark
Hands and face against the wall, so he can arch his back and push back against you. Wraps his tail around you, ends up clawing the wall.
Just lovemaking in his nest in the closet.
Wolf Hybrid Mark
Doggy. Doesn't matter if its you or him on top, but likes this position so he can pull his tail to the side, or knot more comfortably.
Wants you to sit on his face, will lift you with his super strength if need be.
Vampyr Mark
Does it in the coffin for fun, so him lying on his back, or you laying on your back on the silk covered bottom of his coffin.
Floating, or him just, becoming shapeless and giving it to you from all angles.
Sinister Mark and Mohawk Mark would definitely be the ones to catcall the reader in the house the most and are the most likely to tag-team.
Second place goes to Omni Mark and Viltrum Mark (or Sheisty Mark, I imagine Omni Mark isn't picky about his threesome partner)
Honestly, I think sinister and mohawk tag team only to try and one up each other. They give the vibe of two territorial dogs who snarl and snap at each other, frothing at the mouth and barring teeth and all.
Since they can't both be on readers dick at the same time, at least with their hole (which hole depends on what anatomy they got,,, or if it's the pregvincible au,,,), so I imagine they almost “fight” on the readers dick with their mouths. They are biting each other's tongues and all, until reader snaps at them and tells them to quit, before they accidentally bite his very human dick off.
Probably ends up with one of them riding readers face and the other rides his dick, just so they both have something inside them that's equally good. Reader is gonna be sore and out of breath, limp on the bed as mohawk and sinister keep fighting on the floor. At least the view is good...
Omni-mark and viltrum Mark are more stoic and just... quiet and thinking, planning. As much as viltrum mark loves his cock tortured, he loves doing it to reader as well. Reader starts sweating when he catches the two of them looking at him, more quiet than usual with thoughtful expressions on their faces.
They both want to drain reader down their throats, and of course they both want a load to swallow of equal size and yes, they are stroking and milking until they get the same amount. Then they each want to ride the reader, with equal loads pumped inside them too. You have no idea how they check, cuz at this point reader would be seeing double.
One of them rides you as the other laps at the readers balls, or bites and licks at the readers neck and chest. If they're feeling extra frisky, theyll ride your face as well. Even better if they are just having a conversation as well as they squeeze reader completely dry.
