A/N: Because I'm an awesome person, I fixed this chapter up as fast as possible so I could post it today. Fair warning, it is very smutty, so if you don't like that sort of thing, don't read it. I hope you like it!

"Did she just—"

"Yeah, she did."

They gaped at the screen for a moment more, before Esposito finally broke the silence. "Pay up."

Ryan handed him a twenty dollar bill and turned back to the screen. Not realizing that he was speaking into the microphone, he said, "Man, they're really goin' for it! Think they'll go all the way?"

To answer his question, Beckett whispered into Castle's shirt collar. "Ryan, if you watch this, I will kill you in your sleep. But before you guys go dark, tell me one thing – is there any indication that the chief can hear us?"

"Uh… no. As far as we can tell, all he has is a visual," Esposito replied.

"Okay. Keep monitoring his cell. We'll contact you when we're— we'll contact you in a few hours."

Ryan and Esposito snickered.

"Well have fun you two!"

"Castle, we want her home by midnight."

"Ryan, so help me, if you don't—"

"Going dark now!" they both said hurriedly, shutting off all of the monitors.

They stared slack-jawed at the now-blank computer and then exchanged knowing glances, each seemingly reading the other's mind.

Esposito got out his phone and opened a new text message.

"Hey Lanie, you'll never guess what just happened…."

"Rick," Beckett murmured against Castle's lips. "Are you sure you're okay with this? I mean, we are being watched, and if you're not comfortable with that, we can—"

Castle put his finger to her lips. "Shh…" he said. "Forget about me. Are you okay with this?"

Beckett smiled. It was very thoughtful of Castle to consider her feelings, especially after the way she had thrown herself at him not two minutes before, but she wanted this more than life itself, and she had to make that perfectly clear.

Kate whispered into his ear. "If I wasn't sure, would I be doing this?"

He gasped as she lightly bit his ear, pulling at it with her teeth. He merely shook his head in response, his ability to speak having been temporarily disabled by her tongue darting out to taste the sensitive skin of his neck.

"Glad we're on the same page. Now let's put on one hell of a show," she breathed.

Beckett slipped her hands underneath Castle's formal jacket and gently slid it off and dropped it on the floor. Then she ran her hands over his body and began to unbutton his shirt, peppering light kisses on the newly revealed skin of his chest. He drew in a deep breath as she went lower. All of his fantasies were finally coming true. In fact, the whole experience was so surreal that he was still having trouble believing that it was actually happening. Kate Beckett was going to sleep with him. Kate Beckett was removing his clothing. Kate Beckett was- Oh my God! Her wandering hands were going much farther than the last button of his shirt. Was she trying to kill him?!

To keep himself from losing it on the spot, Castle swept her off her feet, causing her to burst into a fit of laughter. She put her arms around his neck and smiled up at him.

"I'm really glad we're doing this," she said quietly.

"Me too," he replied, leaning forward to kiss her.

Rick carried her to the bedroom and set her down at the foot of the king-sized bed. Moving behind her, he wrapped his arms around her body and held her for a moment, breathing in her scent.

"You smell like cherries," he whispered for the second time.

He brushed over Kate's erect nipples and lightly pinched them through the silver fabric, sending blissful shivers down her spine. His hands glided over her smooth shoulders until they reached the zipper at the back of her dress. He hesitated for a moment, but one moan from Kate was enough to convince him to continue. He lowered the zipper at an excruciatingly slow pace because he wanted to savor every second of their night together, and as more and more of her pale back was exposed, he realized that she wasn't a dream. For the first time that night, he was absolutely positive that this was real.

Unzipping the final inch, he let her dress fall to the floor around her ankles. She was a vision in high heels and black lingerie panties. He couldn't help but stare.

Noticing a mark on her lower back, he said, "So… a dragonfly huh?" He had wondered about her tattoo for a year and just had to comment.

Kate simply nodded and turned around to face him. She felt very exposed, partly because of her state of undress, and partly because of the camera, but she discovered that the combination turned her on. She had never had an audience before, and she found it surprisingly thrilling.

Castle tentatively reached out to touch her soft breast and she bit her lip in pleasure. A moan escaped her throat as he took her nipple in his mouth and ran his tongue over the sensitive nub. Trailing his tongue over her body in lazy figure eights he went lower and lower until he reached the black lace. He slipped his thumbs under the fabric and slid the panties down, finally revealing what he desired most. Kate bucked against his hand when he found her clit. The friction was almost too much to bear, and he wasn't even inside her and when his fingers felt her wetness and entered slightly, she nearly came on the spot. He laughed and withdrew his hand, sucking her sweet juices from his fingers and then kissing her. She tasted herself on his tongue before he pulled away, leaving her breathless for more.

"I need you in me," she whimpered out of desperation.

Castle smiled. He had reduced the levelheaded detective to a pile of mush with one brush of his hand. But, as much as he wanted to throw her on the bed and fuck her senseless, she was going to have to be patient. He didn't want a one-night stand. He wanted a lifetime. But, in case he couldn't have that, he was determined to make this night last a lifetime.

He gently lowered her onto the bed and she watched as he removed the rest of his clothing, her eyes devouring the view.

A few moments later, Castle climbed on the bed and crawled towards her. Kate sighed when his hands grazed her inner thigh and moaned when he replaced his fingers with his lips, trailing kisses over her smooth legs. The feel of his mouth on her skin was delightful. Teasing her, he quickly passed his tongue over her sensitive clit before returning to her thigh. Her hips involuntarily jerked upwards as pleasure shot through her body from the unexpected movement.

"Castle, please…" she murmured, barely recognizing her own begging voice.

He couldn't resist giving her more, so he took her clit in his mouth and stroked it roughly with his tongue. She arched her back in response and grabbed his hair in her hands, holding him to her heat. He went faster and faster, drawing cries of ecstasy from the woman beneath him. And when he knew she was impossibly close, he slowed his rhythm to almost nothing, keeping her just out of reach. She closed her eyes and waited for release, and just when she thought he would never let her come, he quickened his tongue's rhythm and pushed two fingers inside her. These actions combined sent her over the edge into oblivion and she screamed his name in pleasure. She shook and quivered, tingling all over from the intense orgasm exploding within her and as the aftershocks racked her body, Kate knew that they could never go back to the way things had been before. This night couldn't be ignored or forgotten, and she was perfectly fine with that.

"Now it's your turn," she said simply and before he knew what was happening, she flipped him over with ease and cuffed him to the bedpost.

"Where did you-? What?" Castle stuttered.

"I had them in my clutch, in case I needed to arrest somebody, but I seem to have found a new use for them."

"I think you just enjoy cuffing me," he smirked.

"Well… maybe," she winked. She loved to feel in control, which was one of the many reasons she loved her job so much. Arresting criminals was incredibly satisfying… As is my current activity, she thought.

She trailed her tongue over his chest, going lower and lover before grinning diabolically.

All Castle could do was watch as she took his entire length into her mouth. He moaned in pleasure as she ran her tongue down his shaft. He didn't know how much longer he could last under her ministrations. He bucked against her mouth as she lightly kissed the head of his shaft before pulling a condom from out of nowhere and he stared in disbelief as she proceeded to pull the condom over his length – using only her mouth. It was without a doubt one of the sexiest things he had ever seen.

"When did you—I mean, how did you do that?" he asked in wonder.

"Oh Castle, that is one of the many things for me to know and you to never find out."

Then, in one swift movement, she lowered herself onto him and whatever confusion he might have felt disappeared as he felt her tight walls clench around his shaft. He reveled in the feeling of being totally surrounded by her wet heat; they seemed to be made for each other. His hands were still trapped by her handcuffs, so he thrust his hips upward to meet her body, and every time she slammed herself down onto him, he seemed to go deeper and deeper. He could feel the pressure building within him and he tried to increase their passionate rhythm. They wordlessly gazed at each other, enraptured by the sexual hunger in each other's eyes. Kate pinched his nipples before finally releasing him from the cuffs, knowing that the final outcome would be ten times better as a two-person tango.

Pleasure came at her from all angles when he used his newly freed hands to knead her breasts and rub her clit. Completely taken over by lust, they abandoned all hope of stopping. All it took was two more thrusts to make the tingling in her toes work its way to her feminine heat and explode into fireworks of ecstasy. She shuddered and arched her back involuntarily as she violently climaxed on top of him.

The delicious friction of their bodies being joined together was too much to bear. One look at Beckett's glowing face was all Castle needed to send him skyrocketing over the edge. He quivered with release and collapsed on the bed, taking her with him.

Too exhausted to say anything, they pulled the covers over their bodies and snuggled together. They felt a much closer bond and knew that their relationship would never be the same. Kate smiled into Rick's chest and lightly kissed his lips before falling into a deep and contented sleep.

Castle looked down and the gorgeous detective by his side and grinned. He tenderly kissed her hair and closed his eyes. Life had ended as they knew it

A/N: I'm glad this story got to see the light of day once more. This is the final chapter, but if enough people want me to, and if I manage to find the time to do it, I might be convinced to write the morning after as well. Well, it's time for me to get back to NaNoWriMo! I'm working on an amazing 45-chapter Caskett fanfic called "Sweet December". I'd like to start posting next month, so keep a look out! :)