A/N: Still very M rated.

Kate pulled his head down capturing his mouth with hers. Castle relaxed into her, resting more of his weight on top of her naked body which writhed beneath him. His skin warmed at the feeling of her soft breasts against his bare chest. Kate sucked hungrily at his lips which were bathed in her own scent. As she explored his mouth with her tongue, the mix of his taste with hers caused her mind to fog over and her pelvic muscles involuntarily tightened as she saw flashes of his mouth on her.

She pushed his shoulders upwards, using her hands to guide him onto his side and then his back, never breaking her kiss. She finally released his lips to sit atop his lower abdomen, his hands skimming her stomach and finding her breasts still hard from the earlier exhilaration. She laid her hands over his, willing him to feel her. Raising herself slightly on her knees, she shifted down his body until she was just below his waist. He moved to sit up, yearning to taste her mouth again. Kate, however, pushed his torso down with one hand squarely in the center of his chest and cocked her head, giving him a look that he knew all too well that meant "no arguing". He reclined slowly, amazed at the power she conveyed with one look.

Kate moved her hands to unbutton his slacks, sliding the zipper down quickly, partially releasing the pressure on his aching erection. Castle jerked at the feeling of her hands as she slid his pants down slowly, revealing dark purple silk boxers, peeling his socks off as she reached the bottom. She crawled back over him on hands and knees with surprising agility. Her soft tresses showered down on his chest as she lowered her mouth to his stomach causing his erection to twitch and his jaw to clench.

"Tell me…" she began as her mouth sailed lower on his belly.

"…what you want," her teeth grabbing the elastic waist of his boxers as her hands simultaneously lifted the sides over the rigid pole tenting the soft fabric.

"Christ, Kate. I want… you …ahh," he almost choked on his own voice at the feeling of her lips and then her tongue lightly caressing his tip and then taking him partially into her mouth as her hand gripped his lower half. She swung her hair back with her other hand so she could see his face as she continued. He ran his fingers up across his forehead and through his hair, the other hand gripping the midnight blue comforter beside him. It was as if every nerve fiber in his body was concentrated on feeling her warm mouth on him. The sensation verged on painful, yet was somehow wonderful at the same time. As she continued, Kate almost felt sorry for him, knowing he probably was not going to last long at this rate. She pulled her head up, sucking steadily, releasing him with a soft pop.

He groaned loudly, but somehow did not release.

"Castle…" her breath hot on his groin, her hand milking him gently. She knew he was in no state to talk, but she couldn't help from torturing him just a little. Her tongue traced its way down his shaft and quickly back up.

"Just so you know, I'm on the pill. And…" she kissed his stomach as she started back up his body, her hand still gripping him.

"I… "

"want…"

"you…"

"in…"

"me…" she whispered between kisses, arriving at his neck, her body now stretched on top of him.

He couldn't take anymore of this. He was desperate to be inside of her, but the few neurons in his brain that were still able to form coherent thoughts wanted to savor every moment leading up to their first time as one. His pulsing groin did not leave much time for thinking however, and fortunately, neither did Kate.

"Now," Kate said, demanding and declaring it in the same breath.

She simultaneously righted her body above him, using her hand to guide him inside her tight center with complete control. She paused only briefly, allowing herself to fully appreciate the sensation as he glided past her sweet spot. Kate breathed deeply, relaxing in order to accommodate his length. Castle's hands found her hips instinctively as he rocked into her. She was tight, warm, and very wet which made Castle's throat tighten so that he could hardly breathe.

"God. Kate. How…can …you feel ...so… good?" Castle gasped out as Kate twisted her hips, grinding him further inside her.

Satisfied that he could go no deeper, she raised herself slowly, until he almost escaped her and then sank quickly, repeating the movement a second time as she felt Castle's hands move from her hips to her toned abs, finally gripping her waist. He opened his eyes briefly and was immediately entranced by her figure in the faint light coming from the window. Her body felt like it was made for sex, moving swiftly yet gracefully above him. She trembled a bit, feeling the familiar icy heat that made its journey towards her palms and soles. Right on cue, Castle's wicked mouth somehow found her breast as he sat up unexpectedly, wrapping his hands to her back and lowering her to the bed, maintaining their union.

"Castle…" Kate whimpered a weak protest. She wondered at how he seemed to still be in such control.

"Shh..." Castle lulled her with a soft kiss and his hips pressing her body with one firm thrust against the bed. Kate arched in response, feeling herself unravel, even as he continued to sway against her. Kate rode her lustful high, wrapping her legs around his lower back, matching his pace. She clenched herself against him once, twice, three times, feeling Castle's body finally break rhythm in response. He moved his face over hers, finding her open eyes with his and felt himself falling into their depths with one last shudder of his body. He made no sound except for his shallow breaths as his head collapsed against her neck.

Kate lay nearly motionless for a minute or so, unwilling to break the perfect stillness. She finally blew softly against his neck, then kissed him there gently. Kate smiled at the full weight of him on top of her. He was completely relaxed, his breathing the only thing that told her he was still alive. She wrapped her arms around his shoulders, allowing her hands to drift down his upper back, feeling the slick layer of sweat that had formed. She felt him shifting a little on top of her, finally raising his head to gaze upon her.

"Round two to me?" Kate asked with a grin, amused at how some of his hair was sticking straight up from his head and knowing that hers probably didn't look much better after their escapades.

Castle swallowed hard, trying to find his voice. He soon realized he had no words, instead kissing her firmly on her mouth as his answer. He pulled back to look at her again, shaking his head in wonder and then kissing her again. He started to pull his body away from her, but Kate pinned him in place with her arms around his neck and her legs along his waist.

"No. Stay," she said with a hint of pleading.

He smiled at her, resting some of his weight on his elbows, dusting her face and throat with kisses. He finally found his voice somewhere during the mêlée in progress on her neck.

"You…that…god…so…perfect," he said now sucking gently on her delicate skin.

"Castle, I'm going to have bruises if you keep kissing me there," Kate said, smile in her voice, enjoying every single moment of his lips against her.

"No you won't. Trust me. I'm very gentle," he said, walking his lips down to her collarbone.

"Rick!" she almost laughed. "That tickles!"

"Sorry. You're delicious. What can I say? I want you," he said returning to her glowing face and joining their mouths once again.

Kate felt a small moan escape as his tongue outlined her lips, then brushed past them as he continued into her mouth. His weight shifted as he kissed her, reminding them both that they were still joined.

Kate gasped pulling away to breathe.

"You want me? How can you want me when you're still inside me?"

"I know. Crazy, right?" Castle said feeling himself start to become aroused again.

The sensation was not lost on Kate either.

"How can you be…?" Kate said, true astonishment in her voice.

"It's your fault. You're just so damn sexy," he said moving against her as he kissed one breast and then the other, withdrawing himself slightly from her tense walls.

Kate's eyes slammed shut as she felt the friction between her thighs once again.

"God... Rick, I'm not going to be able to walk tomorrow," Kate breathed raggedly into his ear.

"Don't worry. I intend on keeping you in bed most of the day anyway," Castle reassured, diving into her once more.

A/N: Can I just say a thousand thanks to everyone's feedback and support! You all are wonderful and it truly did make me want to write this chapter faster and made me feel a bit more confident. I hope this chapter maintains the heat of the last. For those who are wondering, we will get back to a semblence of a plot soon, maybe some fluff to come about their feelings, we'll see. Thanks again!