This Isn’t You (18+ MDNI)
Mindflayer!Billy Hargrove x Plus!Fem!Reader
Summary: An old childhood friend, Billy, is possessed by the mindflayer. One night, he climbs through your window demanding you to submit and join Vecna’s side. You do all you can to bring Billy back to you.
A/N: Billy is trash but his sex is on fire
Word Count: 3.6k+
Warnings: billy and reader over 18, mentions of abuse and parent death, billy is a warning himself, nasty, filthy smut, blood kink, possible virgin!reader, spit kink, catholic!reader, scratching, biting, cum eating, face fucking, nipple play, rough doggystyle, hair pulling, spanking, rough to sweet sex, if you squint billy cries during sex, daddy kink, lot of pet names, small degradation kink, drooling, graphic language, multiple orgasms/creampies, breeding kink, hints of monsterfucking
You were busy doing some homework at your desk when you heard a few pebbles hit against your window. Who could be visiting at this time of night? Rushing over to the window, you slide it up and look out and around then down. Billy’s looking up at you with a large smirk. It’s not uncharacteristic of him to have such a mischievous smile on face but there was something sinister behind it and his wildness in his eyes were no comfort.
“Billy? What’re you doing here?” You asked with a hint of uncertainty.
“What’d ya mean, princess? You know I always come by your place when I need an escape.” His smile never falters.
“Yeah, when we were kids. We haven’t spoken to each other since.”
“If you let me in, I’ll let you explain everything.”
You contemplated for a moment. This was Billy. An old friend. What could go wrong? So you nod your approval.
“Okay, I’ll go downstairs to answer the front door but you’ll have to be quiet.”
“No need for that. I’ll climb up to you.” He points to the lattice on the side.
“Okay, but be careful. You’re not a little kid anymore so that lattice could crumble under all that muscle.” You teased. Although, you were discreetly admiring said beefy body from where you stood.
He climbs up, eyes not removing from yours as if keeping his eyes on his prey. Once he reaches your window, you help him anyway you can slide up the window higher for his entrance. One leg, then the other, then the torso and finally his wicked handsome face.
He’s standing tall before you, hovering over your short frame. Billy just stares down at you. This time, his smile is completely wiped.
“A-aren’t you going to tell me why you’re here?”
Now that you got a better view of him under your bedroom’s lighting, you notice some blood on his shirt and no matter where you looked you couldn’t find the source. This blood did not belong to him.
He twitches a little. “Remember when we were little and you used to let me into your room all cut up and bruised from my dad wailing on me?”
“Uh-huh.”
“You were a true friend. Caring for me when I was in need,” He twitches again, slowly approaching you as you backed away. “I think you’d still take care of me even today.”
“Your dad…d-did he hurt you?” You swallowed the lump in your throat.
“Not anymore.” He chuckles darkly, it sounded like an overlap of laughter like it wasn’t only him.
Your back hits the bedroom door, hand on the knob. You stare up at him, confused what’s making him act this way. This wasn’t the Billy you knew. Sure, he was a fucking douche but he was a product of his father’s abuse.
“What do you mean by ‘not anymore’? Please tell me you didn’t do what I think you did.”
“Nevermind that,” He growls before clutching his stomach, hobbling over in pain. “I need you to take care of me again, princess. I’m—fuck—I’m losing energy. You’re the only one that can give me what I need.”
“I-I don’t think I can. Maybe if we get you to a hospital—“
“No!” He growls again, sounding like a demonic beast. His eyes were pitched black.
He continues. “You’re the only one. I came to you because I know you wouldn’t say no. I’ve seen your dreams, your fantasies…” He presses his raging erection against your tummy. “…your deepest fucking desires. You want me and I need you. All of you.”
His hands roam your curvaceous body, landing on your ass and squeezing. He bites his lip noticing the way your mouth flies open at his touch.
“This isn’t you, Billy.” You gasped, feeling his surprisingly sharp nails prick through your pajama shorts.
“This is all me, baby. New and improved. And I can make wishes come true, too. All you gotta do is help me out. You don’t want me to stay in pain, do you?”
“What’ll I have to do?” You whispered, slightly turning the knob.
“All that I asked is that you serve Him.”
“Who?”
“I don’t wanna ruin the surprise. Just know that he’ll spare you. He’ll give you power and anything you wish for. All you’ve gotta do is say yes. If you follow him blindly, then he’ll know you’re true.”
“Spare me? What the fuck are you talking about, Billy? You’re scaring.” You feel your eyes well up with tears.
“No, no. Shhh,” His hands come up and you briefly spot his sharp claws before he cups your face. He’s caressing your cheeks, wiping it of any tears. “Don’t be scared. I came here to save you. You were the only one who I ever gave a shit about. He says I can save one person from the rapture. I chose you because you’ve saved me once. You’ll make me stronger.”
“Billy,” You grip his face. “Come back to me! You wouldn’t want to hurt anyone. What about Max? What if she gets hurt? You couldn’t live with yourself.”
“I’ve already made peace with that. She’ll be joining us soon, too, but as his vessel.”
“Stop talking like this!”
“Why are you trying to fight this?! You could finally do whatever you want. No rules. No Bible. You’ll never have to worry about sinning or going against God. He’ll be your God now!”
“No!” You turn the knob, trying to make a run for it into the hallway when Billy quickly grabs you back against his chest, wrapping a hand over your mouth.
Dragging you back into the room, he hisses in your ear, “You just made him very upset.”
You notice a light switch in the hallway through the crack under the door. Then, there’s the shadow of feet shuffling in the hall. There’s a knock on your door.
“Is everything okay in there, Y/n? I heard yelling.” Your mother asks, concerned.
“I’m gonna remove my hand from your mouth. You’re going to be a good girl and tell her everything’s okay…or I’ll kill her,” Billy threatens. “You’ll be good?”
You nod, frantically. He slowly unclasps his large hand over your mouth. You take a shaky exhale.
“I’m fine, mom! I just had a nightmare.” You call out through the door.
“We could pray about it together. It’ll help you feel at ease.”
“No. I’ll be fine. I prayed on my own. Going back to sleep, okay?”
“Okay, love. See you in the morning.” Then, the hallway lights shut off.
Billy waits for the familiar shut of a door before he’s shoving you onto the ground on your knees. He stares down at you with a teeth-gritting grimace.
“You almost lost your entire family for that stunt!”
“I’m sorry.”
“Oh, you’ll be real fucking sorry,” He winces again in pain. He’s getting weaker. “Say a prayer.”
You just stare up at him, confused. He grips you by your hair, making you rise a little to reduce the pain.
“Now!” He says, expressing this as his final warning.
You hurriedly clamp your hands together in front of you. Eyes squeezed shut.
“Magnificent Mother Mary, my redeemer, with a guilty heart I come to you. My mind was weak, I played with temptation and paid the price,” You squeaked in fear when you hear the unmistakable clanking of a belt unbuckling. You squeeze your eyes tighter. “Absolve me of my sins, bring light to my darkened soul. I accept my deserved punishment so I may live in your glory afresh.”
“Open your eyes.” He commands.
You obey his orders, eyes leveled with his painfully hard cock, red in its fury. He’s large and, by the look on his face, he’s looking to tear through you.
“I still need to be taken care of, princess. My question for you: will you accept? You’re free to back out of this but that wouldn’t guarantee your safety for when the time comes. Yet, something in the way you look at dick tells me that’s the further thing from that pretty empty head of yours. Go on and taste. Bet you won’t be able to resist after one lick.”
Maybe if you try and do horribly, he’ll leave you alone. So working up the courage, you wrap a tiny hand around his length. It’s even bigger than you thought. How will it fit in your mouth?
Precum leaks out of the pink head, you stick your tongue out collecting the sticky fluid on your tongue in one licking motion. A long line connecting your tongue and his cock stubbornly drags along with you as you pulled away before breaking off and slapping against your chin.
You lick your lips. He tastes so intoxicating. Before he could even ask you if this was what you wanted again, you lick at the slick head once again then suck.
“Mmm, fuckk,” He groans, head rolling back. “Your mouth feels so good. I already feel the energy coursing through my veins. Think you could take more?”
Cupping the back of your head, he shoves himself deep down your throat. His sharp, nails digging into your scalp overloading your senses as he fucked your mouth. You rest your hands on his thick thighs, gagging around him which eggs him on. Soon, he’s thrusting so hard that thick dripping saliva runs down your chin and form a small puddle on your bedroom floor.
Through all of this, you can feel pooling heat in your underwear at the words and sounds spilling from Billy’s lips. You’d always believed that Billy would be a dirty talker and now you get to hear it first hand.
“Sssss, oh fuu—swallow my cock, baby. Just like that. Choke on that shit.”
You hum a moan, vibrations shooting up his length. Your hand tugs and caresses his heavy balls, looking him in the eyes as to show him that you planned to ruin him just as much as he would you. The tip of your nose is tickled by his pubic hairs each time he makes you swallow him whole.
“Want me to cum down your little throat?” He asks wryly.
He pulls your hair backward, yanking your mouth away from him and allowing you the chance to breathe. He awaits you answer as you cough at the sudden lost, your satin shirt soaked in the process.
“Please, I want it in my tummy. Cum in my mouth.”
“Such a greedy whore,” He lets go of your hair, letting you take the reigns. “Make me cum.”
You wrap your hands around the base barely able to get it around. Doing a twist and tug motion around him, you suck hard on the sensitive tip. From time to time, you circle your tongue around him then lower your mouth again so he hits the back of your throat. Your hands were getting drenched in the process which signaled that you were working hard for his end.
“Goddamn, baby. You want it that bad, huh?” He laughs. “Let me give you what you want.”
Your head comes in contact with the wall behind you. Your hands now in your lap with him thrusting freely into your mouth. Tears and saliva wetting your face at the intensity of the act. You weren’t sure how you weren’t vomiting as quick as he’d been stroking into your mouth but somehow with him you were like a veteran succubus.
His hands rest on the wall behind you from leverage, the sound of the belt resonating the air with each thrust.
“Gonna cum, gonna cum.” He chants, face contorting in utter bliss and your eyes light up witnessing such a beautiful sight.
Then, you feel the sticky substance paint down your throat. It’s slightly salty and hot taste lingering on your tongue even after you’ve swallowed him all down.
Billy pets your hair, smoothing it down as he shoves his cock into your eager mouth over and over and rides the waves of pleasure. Once he pulls out, you stick out your tongue to show him that you’ve drunk all of his essence, not leaving a drop to waste.
“You sure know how to show a guy a good time. I’ll give you your reward. Take the shorts off. Gonna eat that pretty pussy.”
You moan at his vulgarity, pulling off your satin bottoms and underwear as fast as your hands will allow. You were caught off guard when he lifts you off the ground effortlessly as if you weighed the equivalent of a feather.
Laying you down on your mattress, he pulls you by the legs just enough for you to rest near the edge. His eyes as dark as the night sky as he stares at your core, sticky and wet with your arousal.
The sight before him has him buckling down to his knees. It was heavenly. He doesn’t wish for his mouth to be away from it a second longer. Billy dives into you swollen pussy, lapping away with his long, fat tongue.
“Oh, fuck yes! Billy.” You yank at his curls. He’s pleased at this action, smiling as he licked at your cunt. His tongue was inhumanly long and you were convinced that he was some sort of entity. Yet, the way his hands caressed your thick thighs lovingly indicated to you that maybe he’s still human.
Billy didn’t make you feel embarrassed for not shaving either, gripping on to your pubic hairs to pull back your folds and spread you wider for him to taste.
“Tastes amazing, baby.” He slaps a hand on one thigh, causing you back to arch and your pressed further against his face.
His long lashes flutter and eyes close, enjoying the moment and the little whimpers leaving your lips. He sucks and kisses your pussy as if he were making out with it. You realize this was all to entice you to wrap your thighs around his head because when your knees pressed against the side of his face, he began moaning louder.
You feared you’d block his airways should you wrap him in your embrace but as if he read you mind he squeezes your thighs tighter around him, keeping you there.
“It’s so good. Nothing I’ve ever had before, daddy! Oh, god.”
Billy wanted to stick his finger inside of you, hoping he’s get a preview of your tight walls but the evil part of him wanted you to struggle to take his large cock. Instead, he’ll show his mercy by making you cum so that your slick enough for him to slip in.
Each lick of his tongue sent you further and further into madness until he looks you in the eye one last time and like magic you cum on his tongue.
“Oh, god. I’m cumming!” You cried out, writhing against him.
He shushes you, whispering darkly. “Shut the fuck up. You’ll wake the entire house and you wouldn’t like what happens next.”
He doesn’t give you a moment to recover from your shattering orgasm. Billy immediately flips you onto your stomach, bringing you on all fours. Rubbing the tip through your folds, he bullies himself into your entrance and pounds away without missing a beat.
Your face falls into the mattress, gripping the sheets for some comfort from the heavy slaps against your back. He’s still fully clothed only his jeans lowered, too eager to remove them. You wanted him completely naked, feeling every inch of his skin on you. You wanted to look at him in the eyes as he takes you.
“Let me see you, daddy. Please.”
He spanks your ass. Then, he kneads the sore spot only to slap a hand hand hard against your soft ass cheek again.
“But you look so damn good from behind, babygirl.”
“Wanna look at you. Wanna see watch you cum again, please. Please!” You whined, practically sobbing.
“I guess ya earned it for being such a good girl.” He flips you onto your back again and plunges into you causing you the two of you to groan simultaneously.
You pull off your top, giving him a view of your tits as they bounced at the force of his pounding. Thirsty to feel him, you rip at his shirt revealing even more of his chest to run your hands over his sweaty abs.
His large hand grips a handful of your boob flicking a thumb over the hardened nipple. “You’re so fucking wet, Y/n. It’s soaking my jeans.”
“Then take them off.” You mewled.
“I make the orders here.”
You scratched down his chest, sinking your nails into his side and for one moment his sinister persona falters when you lift yourself to kiss his chest.
“What’re you doing?” He asks.
“You just feel so good. So deep.” You say in a shaky breath. You pull his face down, lips colliding. Your tongues fighting for the upper hand.
When he pulls away, he’s dazed. You’ve come to the conclusion that every intimate touch brings out the real Billy. If you keep it up, eventually he’ll come back to you.
So you attempt another moment of intimacy, sucking and biting on his thick neck and feeling his thrusting get harder.
“Wish I can have you inside me forever.”
“Uh-huh.” He moans, hitting harder against a deep spot within you.
You move your face to look him in the eye once again, hand on his cheek. He moves his hand to your face as well only you drew his thumb into your mouth sucking the tip lightly.
“Oh god.” Billy whispers. His eyes lowers to look between your body’s which was a mixture of your creamy fluids and blood. Had he just taken your virginity? He assumed you’d lost it to your first boyfriend.
He looks up at your face again, you pulling him into another passionate kiss and taking in his spit into your mouth. When he felt like things were getting too romantic, he’d tried to pull away but you wrapped you legs around him taking him deeper into your wet cave. Now you’re nails are in his lower back. If his shirt weren’t in the way, you’d be drawing blood for sure.
“See how wet you’re making me, daddy?”
He’s rendered speechless by you consumed by the warmth of your body. He’s always loved your body. He’d imagined your body against for so long, hoping to kiss your soft belly and imprint his finger tips into your plush ass and thighs. Finally, he gets this time of intimacy with you. Finally, you were under him taking every inch of his throbbing cock.
Slowly, whatever entered him the other night was soon beginning to melt but it was still very stubborn. You were determined to free him even if it meant all night.
Taking his wet thumb, you bring it down to rub at your clitoris. Your foreheads resting against one another, panting as you clenched around him.
“So fucking close.” You whimpered.
“Me too, pretty girl.”
“Can you cum in me? I wanna take it all my slutty pussy.”
“Oh shit, Y/n. I think you’re trying to kill me.” He laughs, breathlessly.
“Need it now. I love you so much, Billy. Please come back to me.”
“Unh, god—I’m gonna cum in this pussy.”
“Please!”
He hits into against your spongy button over and over again and you get the feeling like something’s going to burst within you. He rubs frantically at your clit, your juices coating his thumb. You cum hard, the wind knocked out of you.
Billy soon follows behind you, shooting his thick cum into the deepest parts of you. He lets out an animalistic grunt that causes another flood of your arousal to soak his cock.
He’s thrusts a couple more thrusts into you before attempting to get up. You don’t let him go, tightening your legs around him and kissing each bicep.
“Don’t stop cum in me again.” You were insatiable. It went beyond bringing him back at this point. You wanted to fuck him until you could feel him even after he pulls out.
He rocks into you again, catching the bars of the headboard as leverage as well as to keep it from banging against your wall. Your driven up higher and higher up the bed from his forceful thrusts. He catches a nipple in his mouth, rolling his tongue over it. As sensitive as you both were from two orgasms, you both gladly chased for the third.
You chant your ‘I love yous’ to him. You discovered your breakthrough when he started chanting it back to you. His eyes becoming wet with the intensity of emotions overcoming him.
“God, I love you.” He growls then bites your nipple.
“Cum for me, daddy.”
He slaps a hand on your clit once and your violently convulsing under him, cumming yet again on.
“Fuck yeah. Cream on this dick, babygirl.” His voice strained, signifies his impending orgasm. Not long after he comes inside you once against the squelching and stickiness between your bodies prominent. “Ahh, shit.”
If you were horrible, you’d make him go again. But you figured he’s had enough. You unhook your legs off him but he stays collapsing above you and snuggling into your body reverting back to the old perverted Billy you know.
“As much as I’d love to have you lying on me, you’re really heavy.” You giggled running your fingers through his hair.
“Right, sorry.” He rolls off of you, the lost of contact causing you to whimper. He rests beside you, cock still standing firm.
“Is it really you, Billy?”
“I think so.” He says, looking down at himself.
“What happened?”
“One night, I’m driving. I get attacked . Next thing, I know I’m…different.”
You hugged his side. “At least you’re hear now. Whatever attacked you, won’t hurt you again.”
Billy kisses your forehead. He knee it was far from over. Vecna will soon return and he’ll be right back in his control. For now, he’ll savor these moments for when he’ll be a monster once again beckoning you to the dark side.
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Broken Halo - Whumptober 2023
Then a scream. Not in the room, in his head. It stopped everything. He couldn’t feel anything. It was white hot yet freezing cold. He couldn't see anything but the white force around him. He felt something being taken from him, ripped away but he didn’t know what.
This was death, this must be what dying felt like there was no other way. He must have died in that crash, it had to have been worse than he thought and this was a weird hallucination as he died alone on a country road. Pain and blood and emptiness all curdled into one.
----
An extended scene of when Billy gets possessed
For day 23 of @whumptober . Also on AO3
Words: 1054
Something rustled in the undergrowth around him. This is why he hated Indiana. Dark, humid and alone. He didn’t want to have to walk to that motel, or home. He didn’t want to hitchhike either, although he could probably just wait until Karen came driving past and hope for the best. If not, there better be a payphone somewhere close by, his head was really starting to hurt.
“Who’s there?” He called into the night.
No-one answered. More rustling, around him, and a distant clanking sound coming from the warehouse. He had the strange feeling that he was being watched.
Catching where the rustling was coming from this time, he shouted “Hey! I said, who's there?”
No answer again. He went to go back to his car to see if it would start when something reached out. Maybe it was the head injury making him sluggish, he’d had plenty of them over the years so knew what to expect, or the fear forming in his stomach that something was off, but he missed exactly what it was before something, or someone reached out and grabbed his leg.
He fell to the floor without grace, his head hitting the wet layer of leaves on the floor and skidded backwards toward the empty warehouse. He didn’t interrupt something did he? Contrary to what Hawkins wanted you to believe, there were undesirables messing up their perfect little town. Billy was probably one of them, and his drug dealer, Eddie, was too. This wasn’t where he dealt to get his stuff was it? He didn’t actually know, he just took the weed, and maybe something stronger when things were really bad, and left.
Broken out of his thoughts again, he managed to grab a doorway as he was pulled more and more downwards. His hands were clammy from the goings on of the night, so he slipped off and bumped down the stairs into even more blackness before he had a chance to come to terms with what was happening.
He hit his head again on the railings as he landed in a basement. No one was in the shadows. And whatever pulled him down here didn’t show itself. Because he was sure now that this wasn’t a person but a thing. It didn’t feel like it had teeth, so not a feral dog or coyote. Did you even get coyotes in Indiana? What about bears? Not the time, Billy.
A radius of pain hovered around his head like a broken halo. He lifted himself off the ground to try and get away but became aware of a sickening weakness dragging him down. The stairs in front of him became blurry as he army crawled his way to them. To escape.
The thing reached out from the darkness again and grabbed his leg. This was a peculiar situation. Creepy and close in a way he didn’t like. The air felt like a cold, clammy breath that somehow made his hairs stand on end and made him sweat all at the same time. It felt like being ill, that feeling of not being able to breath through your nose and shivering with a fever for days on end.
He stopped where it had originally put him. Instead of it pulling away though, the thing that was pulling him made itself known. It was a dark green, almost black, tentacle? What the fuck? That wasn’t a coyote, was all he thought as a mouth opened on the end and darted out toward him.
He didn’t get a chance to dodge it. Didn’t get another chance to escape before it latched onto his face and pulled. Was it killing him? He couldn’t describe what was going on. The feeling of vomiting and choking all at the same time. Like a bad kiss and a bad high mixed into one. The sourness of bile sticking in the back of his throat as he shook and felt something, physical or not, going in.
Struggling didn’t do anything. He tried to reach up, to pull it off, he didn’t want to have any aliens pop out of his stomach like in that film, but it was latched on. It carried on harder, stronger, digging into his face so much he swore it was drawing blood. Maybe that’s what it wanted? Was he food? Was he going to die?
The pain got worse. He couldn’t deal with the sensations and tried to force it off, tried to make it stop as it encroached on him more and more. He was beginning to feel violated in the worst way.
As it got closer, he began to see flashes of something. A house, one he swore he’d seen on his night drives around Hawkins. People without eyes, blood on their faces, body contorted. A lab, a girl, children with tattoos of numbers on their arms. Flashing lights and blood on white tiles. A hole in the wall, no, a portal opened up. A girl struggling in a tank, running in the rain. A kid, that Byers kid he thought, getting pulled away, a monster stalking a party. Dogs, not dogs but something similar chasing Max, Max? Tunnels making things rotten, a stranger world so similar to his own by a dark reflection.
Then a scream. Not in the room, in his head. It stopped everything. He couldn’t feel anything. It was white hot yet freezing cold. He couldn't see anything but the white force around him. He felt something being taken from him, ripped away but he didn’t know what.
This was death, this must be what dying felt like there was no other way. He must have died in that crash, it had to have been worse than he thought and this was a weird hallucination as he died alone on a country road. Pain and blood and emptiness all curdled into one.
Then darkness. Stillness. Quiet as whatever it was retreated. Billy lent over and vomited. His head hurt more but before he could get up, a voice in his head said ‘Stop’ and the worst thing was that he listened. He listened to it without question. Neil could only dream of this kind of cooperation.
‘Sleep’ was the next command. And he did just so, as the world went dark. He stopped questioning it.
----
The prompt was "Who's there?" and my first thought was of Billy getting possessed so here we are. I'm very proud of this, the description especially, I think I captured what was in my head very well. Thanks for reading! @whumptober-archive
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