Archive of Our Own ^beta

He’s pretty sure the text Maddie just sent him isn’t meant for him for a couple of reasons. One, she called him my love, two, she said she missed him, despite the fact that they’re back in the same house for the first time since she moved it with Doug, so there’s no way she misses him, and, well—

Three, it’s a photo of her tits.

They’re—fuck—they’re nice. Buck knew that, of course Buck knew that, he’s seen her, but she’s also his sister, so it’s never mattered how nice her tits are. They’re the most forbidden boobs of all boobs.

Buck stares at the photo. The fullness of her breasts, her pretty pink nipples, how they’re hard in the cold air of Maddie’s childhood bedroom.

How the photo was taken in Maddie’s childhood bedroom, because that’s where she currently is. Just down the hall from him, because it was Buck’s eighteenth birthday on Wednesday and she came to town to visit him for the weekend.

Fuck, maybe he could swing it, then. Maybe he could walk in there and offer to eat her out, get his tongue swirling around her clit, his fingers inside her pussy, feeling the way the heat clenches around his fingers as he eats her out, and say it’s his birthday. She has to let him.

Buck’s already getting hard, starting to tent his sweatpants as he thinks about it. God, it’d be gross. It’d be dirty and wrong and he wants it so, so bad.

Maddie’s the one girl he’s never been allowed to have. He could have anyone in his grade—and he does. Regularly. Buck’s a bit of a slut, has been since he started high school and one of the juniors on the football team said he had a very pretty mouth. It wasn’t long before Buck was on his knees in the locker rooms, deep throating whatever cock wanted to push past his lips, but none of those guys mattered. The girls who let him finger them in the back of the science lab, hand up their skirts didn’t matter either.

They were nameless. Classmates Buck doesn’t care about seeing ever again. The experience was good, sure, and he likes sex, but—

He thinks he’d like it better with his sister, is all.

And now he’s got a picture of her tits. He’s got a photo of her breasts pulled up on his phone and a hand slowly inching towards his cock, pushing the heel of his palm against it in search of relief.

He moans a little louder than necessary. Loud enough that Maddie can definitely hear him, what with the fact that their rooms share a wall.

Mom and Dad went out for dinner with some friends from college.

This could be his chance.

His phone pings again. It’s another picture from Maddie, still of her breasts but this time she’s pushed one up so she’s sucking her own nipple into her mouth. There’s a picture of the two of them on her nightstand that makes his cock harden fully.

It’s so fucking hot. Her, obviously, but the entire situation. The fact that she sent him a follow up Doug? because she still hasn’t realize who she’s texting, the fact that Buck’s not supposed to be seeing any of this at all, the fact that there’s a bruise blossoming on her other tit because she’s been playing with herself since the first text, the fact that she’s in her childhood bedroom.

The fact that they’re home alone.

Fuck. Buck wants it so bad he can taste it, can practically imagine the way her juices would fill up all of his senses as he ate her out.

He strokes himself lightly, not relieving any real pressure but enough to drive him mad.

His phone pings again. Three texts from Maddie in quick succession.

Evan.

Oh my god.

I’m so sorry, please ignore that.

Buck can’t take it anymore.

He walks over to her room and pushes the door open without knocking. Maddie is, predictably, trying to cover herself up hastily. She does a poor job, one of her boobs slipping out enough that he can make out the bruise she was sucking onto herself mere minutes ago.

“We can ignore this, or I can eat you out.”

Maddie whimpers at his words.

“C’mon, Maddie. It was my birthday just a few days ago. You’re all I want,” he begs, whiny to his own ears.

“Evan, I’m your sister.”

Buck steps towards her, straddling her on the bed. Maddie doesn’t push him off or complain, so he sits down fully, grinding down onto her lap, eyes rolling at the friction on his cock. He looks down and does it again, watches the damp spot  on his sweatpants get bigger as he takes in the sight of him grinding down on his big sister’s thigh.

“You’re the first girl I ever loved, Mads.”

He watches the last of Maddie’s weak resolve shatter.

“Fuck, baby.”

“Yeah? You want me to eat you out?”

Maddie runs gentle fingers through his hair.

“Please.”

Buck grins wickedly, getting off so he can push her up the bed, ripping the blanket off and settling between her thighs.

“Mom and Dad aren’t home, so you can be as loud as you want, okay?”

Maddie giggles breathlessly, fingers going back to combing through his curls. “Okay, baby. You’re gonna do a good job for me and make me come?”

Buck doesn’t answer that with words, choosing instead to lick a stripe through her folds. Christ, she’s wet. Buck pulls back to look at her, taking in the sight of her so needy, so desperate for it. Buck wishes he could take a picture of her like this, take a photo of how pink and soaking she is, how her clit is practically begging for his tongue on it, his lips sucking on it, cheeks hollowing around it as her legs shake around his head.

“Do you call Doug baby?” he asks, pulling back.

Maddie shakes her head.

“No. Doug’s not my baby brother. That’s just you.”

Buck smiles, fucked out and lop sided, probably, because he knows what he looks like when he’s in the middle of sex. His ex-boyfriend took a photo of him once as he came on Buck’s face, and the look of pure bliss in his eyes was honestly embarrassing.

He can only imagine how much worse it is right now.

“Okay. I’m gonna eat you out, now.”

Maddie giggles.

“Okay, Evan.”

Buck dives in, zeroing in on her clit in a way that makes Maddie’s back arch off the bed. God, she tastes fucking fantastic. Heady and sharp and a little sweet, and so addictive. Buck knows for certain he’s ruined for everyone else from now on.

He likes eating pussy, of course he does, but it’s one thing to enjoy it and another to be as achingly hard as he is right now. Because this isn’t just any pussy, it’s big sister pussy, and that just tastes so much better.

“You’re doing so good,” Maddie moans when he sucks on her clit, fingers coming up to tease at her entrance. She’s so warm here, almost pure heat.

Buck could die happy like this.

Maddie’s moaning above him, one hand in his hair and the other twisting one of her own nipples.

Buck kitten licks at her clit when she starts clenching around him, wanting to prolong her release for as long as he can.

“Don’t be a tease, baby.”

“Sorry, Maddie,” he says against her, voice small as he sinks his fingers in and curls them against her. Maddie sighs happily above him, hitching her hips down against his hand.

“My perfect boy. You’ve always been so good.”

Buck preens. She is so fucking perfect, all of this is exactly what he’s always wanted, he’s worried he’s gonna wake up and it’ll have been a dream.

“Now, c’mon. Be a good little brother and make me come.”

Buck moans against her, hips grinding down onto her mattress on their own accord.

He starts suckling on her clit again, pushing his fingers up against her with more intent. Maddie arches her back off the bed, moaning loud and shamelessly. Buck feels a little smug with it. He’s pretty confident Doug can’t make her feel this way.

He’s pretty confident no one else will make him feel this way.

“So close, so close, so—fuck,” Maddie says, thighs trembling as she comes.

Buck keeps licking her clit until she complains about the overstimulation.

“Was that good?” he asks, wiping his chin with his hand and then licking his fingers clean. No way he’s letting a single drop of her go to waste.

“That was perfect. Come here. You can fuck me, if you want. I know you need to come.”

“I’m gonna come really fast,” he admits, a little embarrassed but way too turned on to full care.

Maddie laughs brightly, her eyes shining even in her dimly lit room.

“That’s okay. I just want to make you feel as good as you made me feel.”

Her voice is so gentle, so nurturing. It hits Buck that he just ate his sister out, the realization slamming into him like a truck. He can’t help but grin as he crawls up the bed and aligns his leaking cock with his sister’s entrance.

It’s impressive how he doesn’t come immediately, honestly.

Maddie’s so tight, so wet. She’s absolutely perfect, she’s a dream come true.

“Can I kiss you?” he asks, just to be sure.

“Yes, Evan. You can kiss me.”

He leans down and captures her lips as he thrusts back in. The kiss is as messy as uncoordinated as his thrusts, but Maddie doesn’t seem to be complaining about either. He ruts up into him a handful of times until before he’s coming inside of her, getting her bed all messy with their juices when he pulls back.

Buck stares at her pussy in shock. He’s never come inside someone before. The visual of his seed coming out of her is so sexy he nearly gets hard again.

He’s eighteen, yeah, but even he’s not that fast.

Maddie takes in the expression on her face and grins.

“Mom and Dad won’t be back for a while. Aren’t you curious to find out what we taste like together?” she asks, already guiding his head back down.

Buck can’t even complain.

Best birthday ever.