AN: This was inspired by a very simple image on Twitter that read: your OTP kissing in secret. My mind immediately went to Caskett in Season 5 after her suspension but before their friends knew about them. This is K+.

Precinct Rendezvous

Kate sits at her desk waiting. She's been catching up with paperwork, and the murder board is clean. The clock is rolling towards lunch time, and she expects her partner to show up any minute. He could stay home, but he usually comes in when there's no case anyway. To watch her. To be with her. To make her smile with a cup of coffee. He's been displaying his affections for years. It doesn't make a difference what day it is or if they have a murder to solve.

She's excited to see him. She knows it's silly since she just saw him only a few hours ago before heading to the precinct, but she doesn't care. She loves him, though she hasn't expressed that in words yet, and the romantic aspect of their partnership is still fairly new. She feels giddy on the inside because of him. She's happier than she's ever been since her mom was killed. He's brought so much fun and love into her life that she never thought possible.

She wishes she could tell her best girl friend about them. But then Lanie would surely tell Esposito, intentionally or not. And then there's no way Espo would keep his mouth shut with Ryan. And Ryan can't keep his damn mouth shut with anyone. Also…isn't there still a bet going on? The entire precinct would know, including Captain Gates, which is why they have to remain secretive. Neither wants to jeopardize their work marriage.

Kate sighs, wishing she could kiss her boyfriend upon his arrival – just rush straight to him once those elevator doors open. But no. Even if everyone knew, that isn't appropriate here. She pauses her current task. She thinks about the places they could sneak off to: the bathrooms; the supply closets; the locker rooms; the stairwells. No, Kate, no! You will not given in to his fantasies like that.

She catches Ryan staring at her weirdly, and she gives him the stern look before returning to her task. She tries not to perk up when she hears the ding of the elevator. She poorly attempts to stay focused on work as she hears him greet a few people and his voice plus the coffee scent draw closer. Once the disposable coffee cup lands on her desk, she turns to him. Her face is stoic except for a slight smile while her eyes express the pure joy she's restraining. "Hi," she says, "I told you you didn't have to come in."

Rick smiles and plops into his chair, trying to guard his own emotions. "Yeah, I know. But you're still here. And there's always the possibility of a murder, right?"

"Only you could make murder sound like a good thing." She retrieves her coffee, taking a couple sips. "Mmm I needed this. Thank you."

"Always," he whispers with a wink, expressing everything he's feeling with that one word and simple action.

Her smile grows, but she keeps it tethered. He's wishing he could kiss her right now like when he brought her coffee that morning as she was getting dressed. He doesn't dare speak his desire out loud, not wanting to risk being heard. "So no new case…"

"No new case. So you're wasting your time here." She leans in closer to whisper, "And you're distracting me."

"Ouch, Beckett. I just got here. But I'm curious…how much am I distracting you?" His eyebrows waggle at her.

She shakes her head in a chuckle, sips more coffee, and tries to resume her paperwork. He shrugs his coat off and makes himself comfortable watching her, admiring her concentration; the way her brows furrow; the way she glides the pen across the paper. Even the way she's holding the pen captures him. He could spend hours watching her do anything.

It's after she sips some more coffee that she finally scolds him in her teasing manner: "There isn't anything productive you could be doing? I'm surprised you don't bring your laptop with you on days like today."

"Hmm, I guess I could have. But even though my very inspiring muse is here, I'd feel out of my element. I've gotten use to writing in quiet homey places." He wants to add "where I still see my muse" but thinks better of it.

"You could go bug Ryan for a while," she states softly, eyeing him exiting the break room.

"Yeah." He checks his watch. "Hey, you wanna grab some lunch soon? Take a break and get out of here?"

She doesn't have to think it over, but she does think of how even outside the precinct in public they have to maintain the secrecy. God dammit, why does he have to be such an excellent kisser that I crave it so much? I would love more than kissing, but right now…here and in public…I want his kisses. She covers up her betraying thoughts with "Sure. Maybe we can go somewhere, order to go, and eat here with Ryan?"

"Uhm yeah…" He spots Ryan heading somewhere quickly with a file in hand, and they exchange a wave. "It's just… I thought we could get out of here and eat where we don't have to be careful with our words."

Now her face dissolves into a gaze of pure love and adoration. "Yeah, I would love that." Her tone gives her away too. Her expression suddenly tenses as she pulls away from him, watching Esposito strutting close and carrying bags that she suspects contain hot food from the smell of them. "Hey, Espo. What brings you in early?"

Castle turns to see him and eyes the food, presuming he's brought lunch for everyone. "Is that lunch?" He masks his disappointment.

"Hey. Yeah, there's enough for all of us. Figured you guys would need sustenance, though I didn't expect to see you, Castle."

"You know I show up even when there's no case," Castle says.

"Right. And you make googley eyes at Beckett nearly the whole time," Espo teases. Beckett and Castle share a brief look, thinking their secret may be out. "And it annoys the hell out of her," Espo adds, laughing.

Castle joins in the laughing, but Beckett replies, "Could we not refer to me as if I'm not here? And also do I have to be the target of all your jokes?"

"You're too easy," says Espo before rushing to the break room in fear of Beckett's intimidating glare. Ryan returns from his errand and joins Espo, asking, "What'd I miss?"

"Well, so much for our lunch getaway," Castle states sadly.

"There will be other lunches," she assures him.

"I know, but…" He lowers his voice so only she can hear. "I wanted to be alone with you. As alone as possible." He imagines sneaking a kiss from her and them playing footsies under the restaurant table.

"I know. Me too," she murmurs, imagining how she would have kissed him inside her car once they were away from the precinct. Later, her mind tells her. She pats his knee says, "Let's go have lunch and hang with our boys."

After lunch, Kate watches as the boys head in separate directions, leaving her and Rick alone. She gasps softly at the feel of her partner's fingers grazing her knee. She turns to give him a look that is not as stern as she intends it. His face gives up nothing as his fingers inch up her thigh. "Since there isn't a case, do you think I can steal you away for a little while," he asks.

"Like a secret getaway," she wonders, leaning slightly closer to him without even realizing it.

"Yeah," he murmurs, starting to lose himself in her eyes and feeling the urge to kiss her.

"Hmm." Her eyes flick to his lips. "I kind of already had something in mind." Her hand finds his on her thigh.

"Oh, really? Detective Beckett, I thought you played by the rules." His lowered tone is so sexy that it makes her blush and feel warmer all over.

"I do…and I don't want to jeopardize our partnership, but…" Her eyes are on his lips again. Resuming eye contact, she says, "Meet me in the stairwell a couple floors up in five minutes." She's standing and exiting the break room before he has a chance to respond. She sits at her desk, pretending to work, and waits for him to leave, watching him out of the corner of her eye when he does. Once he disappears from view, she keeps a careful eye on her watch, anticipating the 5-minute mark.

Esposito's voice startles her. "Yo, where's Castle off to?"

"Uhh, don't know. Bathroom, maybe?" She takes a breath to calm herself. "There isn't much for him to do. You know how antsy he can get."

"Yeah. You know if it wasn't for you, he'd go home," he replies, sitting at his desk.

"Shut up, Espo," She almost throws a pen or ball of paper his way.

Of course Castle is still absent when she stands to make her discreet exit. She murmurs, "I'll be back," as she passes the boys. They barely acknowledge her with an "mmhmm" and an "okay", and she shakes her head, thinking: and they call themselves detectives.

Castle stands in a corner where she told him to go, trying to be patient. He attempted not to rush or seem eager as he made his way to the stairwell, knowing five minutes can tick by slow. He checks his watch for the hundredth time and hears a door open. He hears someone climbing up the steps and hopes it's her. When he sees her face, he doesn't even try to mask the huge smile on his. "Hey," he says.

She has a matching grin as she hurries to him, embracing him and kissing him passionately. He's caught off-guard at first but then opens his mouth to her, welcoming her tongue, and holds her to him with a hand on her back under her blazer. He moans, and she abruptly stops to warn him: "Be quiet." He nods, and she smiles again before pressing her lips to his.

She knows how wrong this is. So wrong. They are at her place of work where they have to remain professional to keep their partnership intact, and they're kissing in secret. More like making out since her tongue is in his mouth again. She can't help herself, not when his lips feel so good moving with hers. It feels so right.

He can't believe she's allowing this, that she put this plan into motion. They could've actually left the building and gone someplace completely private, like her apartment, but here they are…kissing in the precinct. Normally he's the one to break rules, but this time she's really surprised him. Especially since not even their friends know they are together. Anyone could find them now, and it sends a thrill through him. Maybe she's also getting off on this.

She finds it so difficult not to moan. Staying quiet is easier said than done. She is usually more vocal than him when they enjoy private physical recreation. Eventually, she needs air and breaks away, fighting not to sound so gaspy. She leans against him, hoping he has enough sense to look out for anyone. "Wow," she hears him whisper.

Once her breathing normalizes, she confesses, "Been wanting to do that since you came in. Even imagined kissing you when you got off the elevator."

"Hmmm, you must really like kissing me," he responds, feeling smug.

"Why do I want to do it so much, though? It's like I'm a teenager again."

"We're still in the honeymoon phase here."

"I thought only newlyweds experienced a honeymoon phase," she says, pulling back to gaze at him.

"Maybe kissing is our favorite hobby," he suggests. "We're so good at it."

She grins. "Yeah, we are," she whispers before kissing him again, slower and softer this time, savoring it. They both moan softly.

"This is such inappropriate behavior, Detective," he whispers between kisses.

"I know," she whispers hotly, planting kiss after kiss after kiss on him. She kisses him with more passion and warns, "Don't think this is going to happen often."

"No, of course not." He continues kissing her and doesn't know how to stop. But he realizes he has to when he feels a stirring in his pants. "Kate," he whispers between kisses and holds her back. "I'm getting heated here, and…" He glances to his groin and continues, "I'm feeling a little wired." Her eyes follow, and she understands what he's implying.

"That seems to happen a lot when we kiss," she whispers, her eyes meeting his with a smirk blooming on her face.

"Yeah. We're hot for each other," he states.

She stifles her laugh and steals one last kiss from him. "We better get back."

"Thanks for the secret rendezvous," he says with a smug smile, hoping so much that this happens again.

"I would say 'anytime', but this is not happening again."

Despite her stubbornness and determination to remain professional, it does happen again. And again. The boys remain clueless.