Rick gasped as his bare shoulders slammed into the cold tile wall of the shower cubicle. Steam billowing around the two of them, he hooked his fingers under the bottom edge of Kate's sports bra and dragged it upwards as she raked her nails across his abdomen. Unwilling to let go, she sank her teeth into his top lip and pulled him closer, diving her tongue into the wet heat of his mouth. Raising her fists, she almost tore his tee shirt in her haste to rid him of the offending article. Confronted once again with the spectacle of his naked torso, she let out a growl of approval, the predatory noise echoing loudly off the shower walls. Hunching her stomach, she leaned forward slightly, letting the insistent tugs of his hands peel the sweat-damp bra off her.

The heat in her eyes pinning him to the tiles, Rick gulped at the sheer lust blazing from his partner, suddenly not sure if he was going to survive the experience.

But what a way to go… He thought, his brain rapidly abandoning coherent thought at the sight of Kate Beckett stripping herself down with an efficiency born of a carnal need so overwhelming he could see her hands shaking. Wearing not a stitch, she reached past him and adjusted the water temperature with a deft flick of her wrist, her lips already latching onto the side of his neck. Nipping, sucking, she scorched a trail across the curve of his pectorals, a line of perfect tooth marks mapping her course. One hand already buried in his pants, she gripped the thick length and squeezed him, stroking, her lips already moist with saliva at the thought of what she was about to do.

Drawing his nipple into her mouth, she marked him hard, then let him go with a sucking pop.

"Kate…" He groaned, his breathing hoarse.

"Bucket list number twenty three.." She replied, watching as his eyes widened. Her grin feral, she stepped close to him, her fist tightening around him again, pumping slowly. "Blow Rick in the showers at work." Before the flash of understanding shot through him, she fell to her knees, stripping his shorts into a pool at his ankles. Scooping the discarded clothing up, she flung them backwards, the pile landing on a bench safely out of the way. Her attention swung back to the man in front of her, and she dove forward, her lips parting eagerly as she captured him. Opening her jaw, she slid him all the way into her mouth, her lips wrapping around his length as she swallowed convulsively. She knew from the previous night just how… endowed he was, and she'd been looking forward to seeing how much of him she could handle. Feeling her jaw stretch wide, her throat flexing at the sudden intrusion, she let out a muffled groan, her fingers flexing as she gripped his hips hard enough that he was sure there would be bruises.

She held him there, the swirling vortex of sensations wracking his body - cold tile behind, beads of sweat sliding down his chest, and oh, fuck! The heat of her mouth as she stroked him with her tongue, pulling back as she sucked, her cheeks hollowing from the effort, slim fingers surrounding him and rolling, sliding…

"Jesus, Beckett…" He cursed, the sure and certain knowledge that he was gonna last all of a minute under the onslaught dragging the words from him. "You gotta-" He groaned again as she looked up at him, batting her eyelashes so innocent as she did that with her lips. Holding his gaze, she impaled herself onto him slowly, letting him feel every ridge and ripple of her mouth , before working her way back, teeth grazing the length of him. Holding the head inside, she sucked, flickering the tip of her tongue over, around, across. She shook her head from side to side, her molars rasping across his sensitive skin.

"mmm mmm" she mumbled, knowing the effect she was having, relishing it. He didn't get to hold back, not now. Spreading her knees apart on the chilly tiles, she slid her fingers across the wetness that coated her throbbing core, shoving them deep inside with abandon. Her hips bucking, she ground onto herself, her other hand grasping for his. Guiding him, she placed his hand on the back of her head. Getting the hint, he wove his fingers into the tangled mess of her hair, tightening as she increased her pace. Faster and faster she moved, barely taking the time to breathe through her nose as she slammed him into her mouth, her fingers dancing between her thighs as she felt the rapid coil of her release nearing. The fine tremors running through the author let her know that he was only just holding on. Taking it as her cue, she reached around behind him and grabbed a handful of his ass, squeezing hard as she used the extra leverage to work him even further down her throat.

Holding him there, she worked her jaw, flexing, stroking. Her eyelids slammed shut as her orgasm ripped through her, white starbursts exploding in front of her,feeling the hard clench of her core spasming around her fingers. Rick went shockingly still for a heartbeat, caught off guard, then came hard, scalding waves of his release filling her mouth. Her lips sealed around him, Kate swallowed roughly, dragging her head back as she sucked, cleaning every drop from him that she could. Letting him slip free from her mouth, Kate panted, dragging lung fulls of air down. A wicked smile on her face, she licked a tiny drop that escaped her notice from the corner of her mouth. Sparks of need still tingling through her, she stood slowly, easing her fingers free of her heat. Watching his eyes darken with lust already, she slowly cleaned her essence from them, before molding her body to his, kissing him thoroughly.

Writhing against him, Kate slid one leg up, teasing, her calf caressing the back of his leg for a moment as she canted her hips into him, his impressive length already beginning to rise to the occasion again. Cupping his face with both hands, she lazily worked her mouth over his, the heat between them a slow simmer. Letting out a satisfied sigh, she pressed one (ok, maybe two or three) quick pecks to his lips, already having trouble withdrawing from what was rapidly becoming an addiction for her - kissing Rick.

Her heart beat still thrumming through her, she rested her cheek against his chest, the rapid thud of his matching her own. Castle wrapped his arms around her, one hand caressing the hollow of her back, the other splayed between her shoulders. Rocking to one side, he shuffled forwards into the shower spray, the detective shifting with him in an unchoreographed waltz. Turning together, Rick let the hot water strike him in the middle of his back, rivulets tracing down the defined muscles.

Unfortunately, they realised that they couldn't spend anywhere near as much time as they would have liked, soaking under the spray. The longer they stood there, as comfortable as it was, the greater the risk of somebody wandering in and discovering them. Now that the boys knew about the shift in the relationship (the fact that there was a relationship still took her breath away. She had hoped that that was where they'd been heading for a while, but the reality of it took some getting used to), she was glad they didn't have to hide it from them, but she could do without the rest of the precinct knowing about it just yet.