Disclaimer: Not mine, I don't own Castle.
A/N: Clearly this is very AU. And very M rated. This was a prompt from tumblr but I didn't want to change the rating for Arbitrary and I had so much fun writing this one that I may expand on it. Not anytime soon but I'm posting it alone just in case. Since I put the prompt in the summary, I'll stick it here too just in case you clicked without reading the description.
Prompt: C/B are doctors and put the on-call room to good use.
Pleasure zips up her spine, crawls through every limb and she's alive with it. Clawing at the thin uncomfortable lining of the cot. Her white coat is gone, her scrub pants are still trapped around an ankle but the only thing she's aware of is the man between her thighs. They do this now. They sneak off, they shouldn't. She doesn't even like him ninety percent of the time. But he's the one tearing her apart with just his mouth. He's the one licking and biting a slow path up her thigh.
She orders him around a lot. But right now, she can't. Not when his lips are hot against her. Not when her hips jerk hard when his tongue finds her clit. She's already close. He's too good at this. With his hands holding her in place, this might be the only time she fully appreciates that mouth of his.
Yeah. With one hand tugging his hair as she arches into him, she'll admit she likes his mouth. Her body enjoys his. They found that out weeks ago. After arguing for twenty minutes and realizing how horny she was, she hadn't been surprised when he'd trapped her against the wall and kissed her crazy.
But her reaction to him still stuns her silent. Even now, with her legs over his shoulders. Moans and sighs being all she can manage as he groans at her taste. Maybe his name slips out once or twice. Castle. Okay three times. Definitely three times in rapid succession when he slides his fingers through her folds and sucks hard. She's been soaked from the moment he asked when she could slip away for a moment. His voice low and husked in her ear. She knew what it meant. This is what they do. Quick and dirty meetings they pretend never happen.
He smiles against her pubic bone, nips his teeth into her flesh and she bucks against him. Her skin flushing with heat and her muscles clenching tight. He knows how to wind her up. He knows how to curl his fingers and make her spine bow. And she almost hates him for it. She wants to. She wants to hate him for how quickly he makes her orgasm, how hard he makes her come. Because she can't, she's too busy praising his ability for the tremble in her thighs and the way she's gulping air as if she can't get enough.
She bites her lip. Tries not to be too loud. But then he slips another finger inside to curl hard and presses his tongue flat against her and she's shattering. She doesn't know if she's loud, the blood rushes in her ears, her body tenses until her muscles ache. This man shreds her and gives her no time to recover. His fingers leaving her and maybe she whimpers at the loss but then he's gripping her hips. Lifting himself above her.
She's still mid orgasm, body buzzing, when he pushes into her. A long deep thrust. And when did he lose his pants?
It's his blue eyes she sees when hers fly open. When the low moan burns in her throat and echoes out around them. It's the scent of sex that mingles between them and then she's craning up to kiss him. To steal his lips with her own and hold them captive. He tastes of her, a heady dizzying taste that has her chasing when he tries to pull back. But he's mumbling, making it impossible for her to slide her tongue over his.
"Did you lock the door?" Did she? She thinks she did but she couldn't care less because he's thrusting. Filling her over and over. Pushing deep and her legs are still shaking. She's just come down from her high and he's already building her back up.
She cries out when his palm slides beneath her top, beneath her bra. He's unforgiving, almost as if angry at her. Groping her breast, making her hips slam up against his when his fingers tug at her nipple. And then he's shushing her, growling words at her.
"Quiet. You have to be quiet or we'll be caught."
She has to be quiet? He's ordering her. And part of her thrills in that, making her clench hard around his length. Then he's the one that can't keep it down but he's still chastising.
"Beckett. Seriously. Quiet. I know it's hard" he punctuates it with a thrust and then stills, "for you."
"Shut up and move, Doctor."
He does. He does and she's muffling her moans with his mouth. Slicking her tongue against his. Not understanding the possessive touch but reveling in it regardless. But she's a fast learner. Following his lead and sliding her hands up the back of his scrubs to cling, to feel his muscles flex and bunch.
She chases his body, needing every sharp thrust. This time when the spring wound tight between her hips unravels, he's right there too. Sloppy movements and the rumble vibrates through his chest. She sinks her teeth into his shoulder, digs her nails into his side.
He stills. She falls limp and his breathing is loud against her ear. This is when they untangle, when they stop touching and get dressed. This is when they slip out of the on-call room and pretend they didn't spend their downtime fucking each other's brains out.
But something is different this time. Because he doesn't move. His touch turns soft, his palms cradling instead of gripping. His fingers sliding gently up her ribs and she's about to push at his chest when she feels his lips press to her cheekbone. A fleeting brush that has her freezing. This isn't what they do. She doesn't know what he's doing.
It doesn't make sense. Not when he'd pinned her to the wall as soon as she joined him in here. Held her hands hostage with just one of his and had her pants down and his fingers between her thighs before she could choke out his name. He doesn't make any sense. They argue more than half the time they're in the same room. A 'who has the bigger dick' kinda competition and since she has seniority, she knows she wins.
She's the surgeon who's been here the longest. He's the newbie. The one that came in out of nowhere and turned her hospital, her home into his own personal playground. She doesn't like him. So why is her heart clenching when his mouth lingers on her cheek? Why hasn't she pushed him away yet?
And then he's whispering her name. Not Beckett. Not Doctor. Just Kate and they've never called each other by first name. Oh. She knows where this is going and she needs away. She doesn't do this. She also doesn't fuck other doctors in closets, stairways, the on-call room and yet she does it with him. This is her life, this hospital. She doesn't have room for anything. That's why he's convenient. Because she doesn't even like him.
Until her pulse jumps and her body whines at the loss of him when he pulls away. She ignores it, sits up as he searches for his pants. And she's straightening her bra and top when his palm reaches for her face.
"Cas-"
"We should do this outside these walls sometime." No they shouldn't but that's not what she says. She doesn't say anything, just meets his eyes and gets a little too lost in the blue. "Get a bite to eat maybe?"
"I don't think that's -"
"I saw you flirting with him. That other doctor."
"Davidson." And she swears he growls. "Castle, you and I? - we don't even like each other."
"We don't know each other."
"Exactly." She's reaching for her panties in a rush, knocking his hand away in the process. "Look, we have fun -"
"I like you. You're smart, you excel at what you do, I know you have a motorcycle because I've seen you leave. I want to know more."
"Are you saying that you were jealous?" She knows she hit a nerve when his jaw tightens. "Okay, okay. Maybe we can get a burger. I've been here twenty-seven hours. But I'm off tomor- no today. I'm off in a few hours."
"I do love a good cheeseburger."
She doesn't know why his smile makes her stomach flip or why she dresses a little more slowly. Until he's called away. His name being paged and she watches as he backs out of the room.
He's grinning at her, going on about burgers and she tries to warn him, tries to tell him but he's turning before she can. Smacking into the door as if he's forgotten it exists.
He unlocks it hastily, slips away with a look back at her. And he's adorable.
Shit. She's doomed. She likes him.