Title: Following the Rules

Summary: Beckett decides that Castle has been so good at following the 'no-PDA' rules of their relationship at the precinct, she decided he really deserved some kind of reward. Established relationship, smut, pure smut.

Rating: M, very definitely. I mean it, don't read any further if the thought of consenting adults doing things to each other bothers you.

Disclaimer: yadda, yadda, I still don't own Castle etc.

Author's Note: yeah, probably (aka definitely) not 100% in character, but I just couldn't get this one out of my head, so I guess you guys get to share it. My first proper smut-fic in ages, I hope it doesn't disappoint. Given the circumstances, this one could be considered a probable follow-up to 'For What it's Worth'. Reviews welcomed, BYO cold showers.

NevynR


Fighting hard to keep a wicked grin off her face, Kate Beckett exited the elevator and made her way to her desk. The reasons for her cheerful demeanour were plentiful: she had a fantastic boyfriend, who just happened to be one of her best friends, and was also her partner. Having finally taken the plunge several weeks ago, neither of them could believe how ludicrously happy they still were. The only downside to the whole thing was that neither of them could seem to get a handle on their raging hormones. At their respective abodes, it wasn't such an issue (unless you count the several times they had nearly been caught in the act by Alexis or Martha, or the now semi-regular 'keep that noise down' from the tenants who had the misfortune to live next door to a certain detective. At work, however, they had both agreed to a strict no-PDA policy.

The downside to that was an almost primal response: forbidden fruit is always sweetest. Whilst nothing they did compromised their ability to do their job (well, Beckett's job, at least), they had a hard time keeping their hands off each other during the day.


All week, Castle had been good. He had kept his hands to himself, and the flirty banter had crossed no lines that they hadn't been over in the three years since he started following his muse. That level of restraint, Beckett thought, deserved a reward. It was with this thought in mind that she had packed a few extras in her bag before she left for the precinct nice and early, leaving a pot of coffee in the machine, and a note on the pillow next to her lover.

Rick,

I have a few things to take care of at the precinct before you come in. Text me when you get to our desk, please.

Love,

KB.


Sitting down at her desk, Beckett logged into her computer and checked a couple of emails, before grabbing a coffee from the espresso machine in the break room. She glanced around the break room quickly, making sure she was alone. Taking a few mouthfuls from her coffee, she topped it up with cold water from the tap before heading back to her desk.

Checking her watch, she knew that Castle would be on his way to the precinct by now. Seeing Ryan and Esposito already at their desks, she acknowledged them as she sat down. Wiping the smile from her face, she decided it was time to put her plan into action. Deliberately, she knocked her lukewarm cup of coffee over, spilling it on her pants.

"Damnit!" She cursed, reaching for a handful of tissues to mop up the mess. Hearing her cursing, the other detectives looked over.

"Problems, Beckett?" Ryan asked, looking a little amused at seeing his usually coordinated boss frantically mopping up spilled coffee.

"Yeah, thanks for noticing, Ryan." She dabbed her pants, half-heartedly. A resigned look on her face, she threw the sodden tissues in the trash and grabbed her bag. "Mind the store, boys, I gotta get changed."

"Sure thing, boss." Esposito replied, chuckling as the duo went back to their paperwork.

Walking quickly, Beckett made her way down the hall to the change rooms. Nearing the doors, she glanced up and down the hall. Seeing nobody, she darted into a storage closet, pulling the door closed behind her and locked it. Taking out her cell phone, she used the light from it to see as she quickly stripped off her stained pants, and opened her bag. A flush of expectation staining her cheeks, she got changed quickly, the next stage of her plan coming together nicely.


Coffees and bear-claw in one hand, Castle pulled out his cell phone as the doors of the elevator opened. Making his way over to Beckett's desk, he placed their breakfast on the desk and sent her a text.

*Just sat down with breakfast at the desk. You be long? xoxo*

Almost immediately, his phone chimed as she responded.

*Say nothing to anybody. Laugh as if somebody has just told a dirty joke. Stand up, and make your way to the storage closet near the change rooms.*

More than a little puzzled, he did as instructed, leaving the food on the desk. He chuckled and stood up, heading down the hall.


Reaching the storage closet, he tried the door, finding it locked from the inside. The second his hand rattled the doorknob, he heard the latch click from inside as it was unlocked. Trying the handle again, the door opened and he darted inside, unseen by anybody.

In the closet, his eyes took a second to adjust to the low light. As his vision returned, however, he had to bite his lip to keep the gasp from escaping him. Stunned, he raked his eyes over Kate's form. Her hair loose, she wore a small pair of rimmed glasses, and a wicked smile. Running his heated gaze further down, she stood before him wearing a white shirt, buttoned at her navel. A lacy black bra peeked out from the gap in her shirt, which was tucked into a knee-length tan skirt. Cream hose sheathed her gorgeous legs, disappearing into a pair of knee-high black stiletto boots. An appreciative growl left his lips as he drank in the sight of her.

A teasing glint in her smoky eyes, Kate ran the tip of her tongue across her lips slowly as she stalked forward, her hips swaying. Silently, she placed her index finger on his lips, tracing them slowly as her free hand slipped the remaining buttons free on her shirt. Stepping back slightly, she carefully unzipped her skirt, allowing it to slide down her hips to pool around her feet. Underneath the skirt, she wore a delicate black garter belt and panties. His eyes heated as they followed her hands, tracing their way down her chest, to toy with her nipples through the fabric of her shirt. Moving her hands down her stomach, she hooked her thumbs into the top of her panties and eased them down as she knelt before him.

Tossing her hair back over her shoulder, she reached for his belt. With practiced ease, she undid the buckle, her fingers teasing as they traced their way down the bulge in his pants. An appreciative purr slipping from her moistened lips, Kate undid his trousers, and pulled them down, boxers and all. Running her fingers lightly up the insides of his thighs, she saw his stomach muscles clench with the effort of keeping silent. One hand cupping him, teasing, she ran the tip of her tongue up his length, circling the head. Pausing for a second, she looked up at him through her glasses. Staring directly into his eyes, she took him into her mouth in one smooth movement. Her lips firmly around his shaft, she worked him with her tongue as she drew him in, maintaining eye contact all the way as her nose brushed his stomach. Swallowing automatically, she held his length in her mouth, filling her for several seconds, her moan of pleasure vibrating through him as her other hand caressed his balls. Seeing his eyes roll back in his head and feeling his legs trembling, Kate slowly drew back, her lips wrapped firmly around him.

She pushed on his chest, forcing his back against the shelves, allowing her a little more room to manoeuvre. Her mouth still wrapped around him, she worked his length with one hand, squeezing and twisting as her head dipped back and forth, teeth grazing him lightly, her tongue flickering over the tip at the apex of every stroke.

Her free hand slipped down to her core, caressing her slick folds in time with her mouth. Speeding up, she reached around him and cupped his ass as she worked her mouth over him. Her lips firm, she drew him out before plunging him full-length inside her, over and over.

Fingers flickering over her bud, she felt a delicious heat pooling between her legs. Hearing Rick's breathing shorten, she knew he was close. Tasting his saltiness, she thrust him deep inside her mouth once more, holding him close as she slipped two fingers inside herself. She moaned her pleasure around him as she came, the vibrations from the muffled cries of her shattering orgasm sending him over the edge with her.

Feeling him spasm inside her mouth, Kate held him there for several seconds, her heart hammering as he spilled himself down her throat. Spent, he gazed at her as she slowly drew her lips up him. Wrapped tightly around, she coaxed every last drop from him, her tongue lapping the last of it from his tip as she released him. Her hair wild, she looked up at him and smiled a slow, wicked smile as she swallowed, licking the last traces of him from her lips.

She rocked back on her knees, still keeping eye contact with him. She drew her fingers out of her core, slick with her wetness. Delicately, slowly, she placed each finger into her mouth and sucked them clean, her eyes rolling, her lids fluttering as she tasted her pleasure. Her fingers cleaned, she reached for her discarded panties. Spreading her knees , she took the panties and mopped the trail of wetness from her thighs, brushing the delicate lace across herself, the texture bringing another purr of satisfaction from her.

Standing, she tucked the dampened panties into Rick's jacket pocket as she pulled the skirt up her thighs once more, the fabric hiding the garter belt and her lack of underwear perfectly. Zipping it up slowly, she wrapped her arms around him, her hands threading into the hair at the back of his head as she pulled him into a searing kiss, her tongue plundering his mouth, giving him a heady taste of herself. Pulling back, she ran her hand down his jaw, placing the tip of one finger on his chin, she gave him a satisfied smile. Pulling back, she quickly buttoned her shirt and tucked it in, grabbed her bag and left the closet.

His mind still reeling, his legs still not quite steady, Castle had barely finished buckling his belt when his phone beeped at him. Reflexively, he checked the text.

*Following the rules has it's benefits, Ricky. Keep behaving like you have been, and there could be more of the same in store... ;-) Wait five minutes, then come back to the desk.*

Five minutes later, and still trying very hard to wipe the grin from his features, Castle exited the closet with a spring in his step. The day looked better already...