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the rot and the ruin

Summary:

Billy and Max fuck in the bathroom of a house party. That’s it, that’s the story.

Notes:

I don't reference actual ages here but I imagined Max as a junior/17 and Billy however many years older than her he is in canon. There is also no references to the Upside Down, but I imagined this as canon divergent after season 2 or 3. I don't know whether I think Billy was ever possessed, but he never died, Neil never left, Lucas and Max never broke up for any real length of time and Max was never in a coma. But it can also read as a No Upside Down AU.

Please mind the tags before you read. It's honestly pretty tame compared to many of Billy/Max fics I've read/seen, but I know people get weird about them and there is very flagrant cheating happening here because Billy is an asshole that gets off on it, Max loves to self sabotage and I happen to think everything is hotter if cheating is involved, so read at your discretion.

(See the end of the work for more notes.)

Work Text:

 

It’s been about a month since she last saw him, but when Max spots her step brother across the party, she barks out a laugh at the sight of him.

 

She can’t believe there was ever a time she thought he was cool.

 

“Is that Billy?” Lucas asks from his spot beside her, his arm curled casually around her waist like it belongs there.

 

“Didn’t he drop out?” Will comments from her other side, nursing a cup that’s mostly still full.

 

“You say that like it isn’t the law for dropouts to hang around high school parties like creeps,” Dustin laughs, and Max bites back the quip she’s dying to make about his best buddy Eddie. The last thing she wants is for anyone to think she’s defending her piece of shit brother.

 

“Do you want me to talk to Andy, get him to kick him out?” Lucas whispers in her ear. “He might listen if enough of the team are on board.”

 

Max scoffs internally at the idea that any other member of the Hawkins High basketball team but Lucas would ever dream of going against their hero Billy Hargrove.

 

The party might see Billy for the loser psycho he is, but to the rest of the school, he’s still a god that won them the championship three years ago. 

 

But she adores Lucas’s optimism, so she just pats his cheek a little patronizingly and says, “It’s fine, we’ll just ignore him.”

 

But Billy is hard to ignore, he always has been.

 

Even at a crowded house party, Max spends the next hour keenly aware of exactly where he is at all times, because she can feel his eyes burning a hole in her wherever she goes.

 

Billy watches Max as she refills her cup in the kitchen, as she talks with her friends, as dances with her boyfriend, and even as she makes out with him.

 

But Billy never approaches her, he never has to. She can feel his presence looming anyway and it’s getting under her skin.

 

“I’m gonna go to the bathroom,” Max informs Lucas suddenly, pressing a long kiss to his lips before climbing off of his lap.

 

He fixes her skirt for her once she’s on her feet, the one she’s still not used to wearing. But she’s trying new things.

 

“You want me to come with?” Lucas asks with obvious concern.

 

Max isn’t sure if it’s because of Billy or because he’s not sure how sober she is, considering Mike and Dustin are currently chatting incoherently on the couch beside them after two drinks.

 

Either way, it doesn’t change her answer.

 

Max knows Billy’s watching her, knows he’ll follow her, and she needs Lucas to not be around for that.

 

“No need for your cape, Romeo, I’ll be fine.”

 

Lucas doesn’t look convinced, but nods anyway, never one to try to tell her what she needs. He’s a good boyfriend and Max loves him, but neither is enough to get her to stay there with him.

 

She pushes her way through her sweaty, rowdy classmates, checks to make sure Lucas can’t see her anymore, then walks past the small line outside the downstairs bathroom and heads up the stairs.

 

In an effort to not be a total liar, Max opts for the second floor bathroom instead of one of the bedrooms, which means it takes Billy an extra minute to find her.

 

“You little fucking slut,” is the first thing he says when he does, reaching for her before he’s even locked the door behind him. “You giving it up to Sinclair now? Since when do you wear skirts?”

 

“You’d know if you ever came home,” Max shoots back, her voice defiant, even though she makes no move to stop her step brother’s hands from rolling up the denim until it’s bunched around her waist. 

 

Billy grins wickedly as he pushes her underwear to the side and his fingers find her already slippery clit. “Aw, do you miss me, Maxine?”

 

Miss isn’t the word Max would use, no. Or maybe it’s the him of it she’d make an amendment to.

 

Max hasn’t missed Billy since he moved out. It’s impossible to miss a piece of shit like him and Neil has been slightly less of an asshole since he did. But she’d be lying if she said she doesn’t miss the sex. 

 

Whatever fucked up way it started, Max grew to like it, and then love it. And now she does miss it.

 

But as she’s already established, she is a liar. “You wish.”

 

Billy sees right through her, and her body tells the truth. He easily slips two fingers into her soaking wet cunt and she gasps, leaning into his chest as he starts to fuck her with them.

 

“Don’t lie to me, Max,” he whispers, the old threat that used to terrify her sending a different kind of shiver down her spine now. He brings his thumb to her clit and starts circling it, bringing her close to the edge and then retreating. She whimpers when he stops, looking up at him as he pushes the red, curly hair out of her face with his free hand. “Tell me you miss me.”

 

Max whines and swallows her instinctive, sarcastic reply. A house party full of her classmates, where Lucas is right downstairs, is not the place to fight back. 

 

“I miss this,” is the best she can do, but thankfully that’s enough for Billy, and he starts up again. 

 

He knows her body well enough after all these years that he makes Max come on his fingers in under a minute, and he gives her even less time to recover before he’s getting his pants undone and dragging her over to the toilet.

 

Billy flips the lid closed and drops down on it, spreading his legs as wide as the jeans around his ankles will let him. He holds the base of his rock hard cock with one hand and maneuvers Max’s much smaller body with the other, spinning her around so she’s facing away from him and then tugging her in by the waist.

 

Max moans as Billy’s fat cock breaks her open, her tight cunt stretching more easily around the familiar size of him now than it did when she was younger. It used to hurt so much when he first started fucking her, but it’s like her pussy reshaped itself to fit him over time. 

 

It only takes two tries for her to take all of him now, and after she does it a few times, Billy takes her hips in both of his big hands and starts moving her body up and down his cock.

 

Her eyes cross as she feels every ridge and vein of it as he feeds it to her, bracing herself on his knees to keep herself up right because her own knees have gone weak. 

 

“Your cunt’s still nice and tight,” Billy grunts from behind her, keeping the pace slow and long and torturous, and Max knows it’s because he likes to watch his cock move in and out of her, watching it getting wetter with each stroke. 

 

Billy’s favorite is when he can actually see her cunt stretch around every inch as he pushes it in and out slowly, the way her pussy lips spread apart for him. 

 

He hasn’t been able to do that way in awhile, not since he moved out; Billy has roommates he doesn’t want Max around and he refuses to come home, so the last few times they’ve fucked, it’s had to be quick and quiet like this. The handicap stall in the boys washroom at the Hawk or the alley way behind Melvald’s where she works part time now or the backseat of his Camaro parked out by Lover’s Lake. 

 

It’s hot and risky, which makes it fun in the moment, but Max can’t believe she misses the days when Billy could take his time with her in the safety of their empty house. 

 

He used to drive her crazy, working her up and then making her beg. Billy used to have time to fill Max up with a couple of loads and then use a quarter of a pack of film taking pictures of his thick cum drooling from her stretched cunt. 

 

She always wonders what he did with all those. 

 

Does he have them hanging up in his room in his new apartment? Are there Polaroids of Max’s raw, pink pussy filled to the brim with her step brother’s semen taped to his mirror? Would he really risk his roommates or the girls he brings home seeing them? It’s not like her face is in any of them.

 

Max mewls at the thought and feels her orgasm barrelling towards her before she knows what’s happening.

 

Billy senses she’s close and loosens his grip on her waist, laughing as Max starts fucking herself as on his cock as she desperately chases her pleasure, then slams herself down into his lap once she catches it.

 

“Fuck, Billy, fuck, fuck, oh my fucking god,” Max chants, sounding as drunk as Mike and Dustin had earlier. 

 

Strong arms wrap around her chest to hold her in place, keeping her snug on Billy’s dick as she comes hard around it. Max’s entire body trembles in Billy’s embrace as intense waves of euphoria roll over her, her pussy clutching, clenching and dripping around his cock.

 

Billy waits until it’s passed and Max has slumped her entire body against him before he moves a hand back to her pussy and starts rubbing furiously at her clit again. 

 

Max whines in protest, way too sensitive, and tries to wriggle away from his touch and out of his arms, but he just tightens his hold on her, keeping her right where she is. Right where she belongs. 

 

“Come on, Max, you’re gonna give me one more,” he hisses in her ear, tucking his chin over her shoulder. “Your little cunt feels so good when it’s coming on my cock.”

 

It doesn’t take long at all for Billy to manipulate her body into another orgasm, and this time when she comes, he does too. 

 

Billy lets out a low growl as he pumps his cum into Max’s cunt, and her pussy is so tight around him as she comes herself that she can feel every pulse of his shaft as he spurts rope after rope deep inside of her.

 

Max’s womb is swimming in Billy’s semen by the time both of their orgasms have finished, and this time when Max collapses against his chest, Billy lets her lay there in peace until she’s recovered.

 

“Fuck,” she mumbles, turning her head so her forehead presses against Billy’s temple. Billy grins wolfishly and cranes his neck to kiss her, slipping his tongue into her mouth. Max lets him. They can get weirdly tender in the aftermath sometimes; it’s the only time they ever kiss. “I hate that you can make me feel like this.”

 

“You hate that I’m the only one that can make you feel like this,” he corrects her, licking into her mouth a second time before he pulls back. He rests his chin on her shoulder again and pats the mound of her pussy gently, almost affectionately. “Sinclair been inside you yet?” he asks again, since he knows she’s on the pill and she never answered him before.

 

Max is tempted to lie, because she’s grown to like Billy when he’s worked up, but she’s too scared she won’t be the person he takes it out on if she does.

 

So she tells the truth for once. “No,” she exhales, ignoring the layers of guilt attached to that answer, along with the way that guilt makes her cunt throb. She’s as fucked up as Billy at this point. “You’re the only one that fucks me.”

 

“Then you better be taking your pills so I don’t knock you up. Not that you wouldn’t have some explaining to do even if you were fuckin’ him,” he taunts, right before he abruptly pushes her up and off of his cock.

 

“You’re such a fucking asshole,” she complains as she stumbles forward, barely catching herself on the edge of the tub.

 

Billy palms her ass cheeks and spreads them so he can take a quick look at Max’s messy pussy while she’s bent over, catching the cum that slides out of the stretched hole on two fingers, then pulls her underwear place in place with the other hand to stop the rest of it from falling out. 

 

Max doesn’t stand up until he smacks her on the ass, and when she turns back to face him, he doesn’t even have to say anything to get her to part her lips so he can feed her the cum off his sticky fingers. 

 

But Billy still roughly grabs a fist full of her hair and tugs her face to his. 

 

“Now go back down there and kiss your shithead boyfriend with the taste of me in your mouth,” he orders her. “And sit back down on his lap with my cum still inside you.”

 

Max bites back a moan, but she can’t tell if it’s from the pain in her scalp or the shameful thrill she gets from their shared cruelty. She’s an even bigger piece of shit than Billy is; Lucas deserves so much better than her.

 

Billy kisses her one last time, rough and messy and all tongue, and then shoves her away. He’s still sitting there with his dick out by the time Max is on the other side of the door. 

 

“There you are!” a relieved voice calls out, and Max looks up to find Lucas standing at the top of the stairs. He rushes over to her and pulls her into a hug. “You’ve been gone for ages. I was starting to get worried.”

 

“Sorry,” Max mumbles into his chest, subtly guiding him away from the bathroom door before Billy can do something impulsive and stupid. More impulsive and stupid. “The line was too long downstairs and then I felt a little sick, so I just… sat down for a minute.”

 

Lucas keeps his arm slung loosely around her shoulder as they walk back towards the staircase, and Max tries her best to keep her thighs together as she walks. Thankfully, if anyone notices she’s walking weirdly, they’ll probably just assume she’s drunk.

 

“Well I missed you,” Lucas tells her sweetly, pausing them both just long enough to tilt Max’s head up and kiss her. He’s just going for a peck, but Max remembers Billy’s words and opens her mouth, deepening it.

 

Lucas doesn’t notice anything off, or he at least doesn’t mention anything when they pull apart. He just grins down at her, completely clueless and trusting, before he presses another kiss the crown of her head and leads her back down to rejoin the party. 

 

Max looks back just once, just in time to see Billy zipping up his fly as he’s leaving the bathroom.

 

When they get downstairs, they find their friends exactly where they left them, and Max lets Lucas pull her back into his lap. 

 

She tries to pay attention to the conversation Lucas and Will are having, but Max can’t think about anything with Billy’s cum inside her, threatening to spill out at any minute, and it only gets worse when her step brother rejoins the party. 

 

He catches her eye and then pointedly moves his gaze down her body with a lecherous smirk. 

 

Max shifts uncomfortably under his stare, feeling guilty, exposed, and pathetically wet. There’s no way she can wait another month to do that again. 

 

She snatches Will’s cup from his hand, and as she downs the rest of his beer in three big gulps, she wonders how hard Lucas would question it if she got a ride home with Billy instead.

 

Notes:

Can you tell I think Billy would have some kind of cum kink, at least when it comes to Max? Anyway please be nice to me, this is my first Stranger Things fic and the first smut I've written in many years.