A/N – I just took this down and had my sister read over it...fixed some of the grammar and punctuation. There are probably still mistake so I apologize in advance.

Succumb

They succumbed a little over a week ago, and all she can really say is wow. Everything is different, everything. The tips of his fingers have always held power over her but now that she's tasted them, now that she knows just what they can do to her the power is overwhelming.

He lingers everywhere. When they walk into a room he pulls the door open and as she walks through it his hand slides to her lower back. It stays there for just a moment longer than it should.

She finds herself anticipating the moments when they're alone in the break room and he can back her into a corner, wedge his leg between hers and cup her breasts in his hands. His mouth will find her neck and she'll sink a little lower on his leg angling into the pressure. She doesn't have to worry his hands won't leave her breasts. She's always left gasping for air and desperate to get him home. Which home doesn't matter, as long as there is a bed or a wall or even a counter, hell she would take just about anywhere as long as they're alone.

She's taken to letting him drive. They haven't told anyone about the changes in their relationship. This means that finding alone time in the middle of the day is nearly impossible, except when they're in her car. When they're in her car, just the two of them she can't control herself and she forgets she's a police officer. She un-clips her seatbelt moves as close to him as she can get without directly straddling him. Her hand weaves a torturous path up the inside of his leg, never stopping quite long enough where he needs it. Her tongue darts out and finds his neck; sucking in a way that she hasn't felt a need for since she was a teenager. His strangled moans and the white of his knuckles as he grips the steering wheel tell her that he is doing everything in his power to keep the car moving forward.

They succumbed a little over a week ago and she can't remember the last time he was able to the leave the car first.

"Rick," she gasps startled and desperate to keep her voice down. They're at the back of the conference room and Esposito is giving the rundown on a particular group of thugs. She should be paying attention, there is a strong possibility one of these thugs could be the murderer in a case she is working.

"Rick," he's managed to slide his hands under her blouse. She's lucky it's loose because they snake their way along her skin to the front of her body and she can feel herself falling back into him. He keeps his eyes on Esposito as his hands skim the undersides of her breasts. A tiny whimper escapes the back of her throat and his hands drop to her hips. They grip onto her tightly and pull her back so that she's nestled right into him.

"Rick," his name escapes her lips for a third time. She can feel just exactly how much he wants her. She barely registers Esposito pausing in his speech as she grabs Ricks hand and pulls him from the room.

"Detective Beckett, wasn't that pertinent information being discussed in there?" He's grinning as she pulls him to the stairs. She's too impatient to wait for elevators, too turned on to think of anything to say to him except maybe 'how quickly can you take your pants off'.

She thanks god that she parked in the underground that morning; even though it was a beautiful morning. Then she thanks him again when she sees her car in the corner spot and not another soul in sight.

She unlocks the doors and surprises him by pushing him into the back seat and climbing on top of him. She doesn't give him time to make a witty reply and by the look on his face she isn't sure he would even be capable of such a thing.

They succumbed a little over a week ago and it's the first time they have truly abused office hours to do the nasty and she is positive it won't be the last.

His hands take up their position on her hips. Though he knows he doesn't have to guide her in her movements, secretly she likes it when he does. Their lips come together in a blur of teeth and tongues and neither of them can make the decision between gasps for air or staying locked together.

This won't be slow. She's come to like slow with Castle, he has a way of drawing everything out, making her feel everything just a little more deeply. Going slow gives her the opportunity to really enjoy every second of being with him; but this won't be slow.

Already he's unzipped her pants and he's pushing them down her legs. This proves to be difficult as he's lying on his back in a squad car and it's not like either of them are tiny. Somehow they manage. He doesn't remember when she pulled his pants down or when she managed to slip the condom on. Things are moving very fast and all he can think about is that delicious moment when she'll position herself above him and slide down. If it's possible his cock is even harder.

He doesn't take her top off. There isn't time instead he slips his hands under her shirt and smiles when he realizes this had only been a hope, in the very back of his mind as he'd entered the conference room not 20 minutes earlier and done the same thing. His hands find the front clasp of her bra and he's silently grateful to whoever invented that. He's cupping her breasts, rolling her nipples between his fingers and whishing he could taste her. He even contemplates latching on through her blouse, the dampness of the material might add to her pleasure.

Before he can turn his plan into action he's stopped. That needy little moan she always lets escape when she has to have him inside of her is making an appearance and he can feel her move over him.

The heat coming from her is killing him and unconsciously he thrust upwards. Just the very tip of him entering her causes both of them to groan and pause. His hands leave her breasts and find her neck and her hair. Their eyes meet and as she opens herself to accept every sinful inch of him, he has to bite his lip to keep from finishing on the spot.

Their eyes never leave each other. He can't believe they have only been doing this for a week because at the same time it feels brand new and incredibly natural. She starts to move and they are back to fast, fast and hard.

She is riding him with everything she has. Rocking her hips, using him to get herself off and it's the hottest thing he's ever experienced.

"I'm not going to be able to last very long Kate," His breath is strangled as he speaks the words.

"Don't worry, neither am I" she smiles down at him. It's the first true smile he's seen since he began his assault upstairs. The smile is wiped clear off her face; he grabs hold of her hips and thrusts up into her hard, hitting her right where she needs it.

"Castle," she has promised to stop calling him Castle during sex. Just the sound of it now gives him a boner but it isn't like either of them are in control.

He thrusts up again, she stutters and then gasps and he can feel her walls clench down on him. He can feel her shutter around him as her insides squeeze. He continues to thrust knowing the movement is prolonging her release and then he too is gone, exploding inside of her. His hands digging into her hips probably leaving marks he'll have to kiss away later.

"Oh god," she cries as she collapses on his chest, completely out of breath. If he weren't feeling exactly the same way he'd make some sly comment about how god had nothing to do with it. Then laugh as she attempts to swat him.

But he's still caught up in what they just did, in the sheer power of it. They're spent, completely spent. She is finally able to lift her head and look at him; she peppers his jaw with tiny kisses before placing a long lingering kiss on his lips and mutters something about how unreal that was. His mind is replaying it and he can feel himself harden within her.

"Rick," her little moan is filled with laughter because she can feel it too. If it were up to her they would climb into the front seat drive right back to either one of their places. They'd continue until neither of them could walk.

"I'm sorry, I can't seem to control myself around you," He says it sheepishly and she can't help but smile because she feels exactly the same way. She lifts herself off of him and they both sigh.

"How long have we been gone?" she looks down at her watch and then back at Rick

"I'm pretty sure the gig is up, I don't think anyone missed how quickly you pulled me out of there." He still hasn't moved; hasn't made any attempt to pull his pants up. She groans at the embarrassment she knows is about to come. Even considers quitting her job to avoid it, but the thought is fleeting and disappears instantly.

"I totally thought we'd be able to keep it quiet for at least a month." The words slip from her lips and he laughs.

"Does this mean I get to hold your hand at work?" he asks eagerly, she doesn't even answer just gives him a look and then climbs out of the car. sometime in there she's managed to get dressed.

"Maybe you should go home for the rest of the day," she leans into the car and he looks a little sad but when both of their glances move down to his fully erect piece, he relents.

"That's probably a good idea; Alexis will be out most of the night...study group. You'll come over after work right?"

"Where else would I go?" she leans in one more time and covers her mouth with his, the kiss is brief comfortable and again she is struck with the knowledge that it's only been a little more than a week.

As she walks back into the precinct, she notices Lanie is standing by Ryan's desk and it isn't just the three of them that are giving her the glare, it's the whole damn precinct.

What did these people expect; they were bound to succumb at some point.

End.

A/N – My first Castle fic, I'm not great with the banter I never feel I get it right so I went dirty instead. Hope you liked it!

Please review, was it too dirty? Just dirty enough? Could it have been more dirty?