AU: This particular one shot is based off the ending scene of season 2, episode 4, "Fool Me Once..". I absolutely loved the expression on Beckett's face when Castle caught her in the bathroom and told her were he sex scene was. Anyway, this is my contuation of that scene. I suggest that if you havn't seen the episode yet you go and watch, it's awesome!

WARNING: Contains some very strong sexual refrences. If your too young or you don't like, just skip over it!

Reminder that reviews are always appriciated! :P


Kate Beckett watched Castle as he turned to leave. She was stuck with a good few hours of paper work to do, but all she could think about was that book. Ever since that CIA agent mentioned the sex scene their two characters shared she was dying to delve deep into the pages of Heat Wave and discover what sort of fantasy Rick had dreamed up.

Checking to seeing that Castle had left, she quickly grabbed her purse and rushed off to the bathroom. She entered the cool marble stall and quickly sat down on the lid of the toilet; bringing her legs up so no one would see her. She began to flip furiously through the pages as her mind began to create its own fantasies.

"Aha! I knew you were reading it!" exclaimed Castle, peering over the wall of the stall.

"Castle what are you doing here!" Kate was completely flustered in her embarrassment. She had been doing such a good job of stringing Castle along, thinking that she wasn't reading his book. She loved his books; he should have known right away that she was lying. The man was simply too fun to tease. Now, it was all ruined. He had caught her in the act, in the bathroom of all places.

"I, was..ah"

"It's on page 105 by the way." Castle said with a smirk on his face.

"Wha…what?"

"The sex scene you're looking for. Oh and Agent Grey was right, it's steamy."

"I wasn't…"

"See you tomorrow" Rick said, whistling with satisfaction on his way out.

Kate was completely stunned at Castle's boldness. She couldn't believe he just walked in here like that and popped over that stall. He could be such an ass sometimes, but his rugged good looks and comical good-naturedness seemed to be continually making up for it.

Recovering from her shock, she quickly skimmed the pages until she found page 105. She began to read, attempting to suppress her excitement.

"Within minutes they had managed to strip each other of their clothes. Rook embraced Nikki in a passionate kiss as he led her to the bed. Rook broke the kiss and began working his ministrations further down Nikki's body. Taking control, Nikki flipped them so she was straddling Rook in nothing but a light blue thong."

Kate's mouth dropped as she read. The scene continued to increase in heat, and she began to feel herself wet at the thought.

"She cried out in ecstasy as he pounded into her, continually hitting her sweet spot with his impressive girth. Within seconds the two came to a halting climax, screaming out their partner's names before collapsing into each other's arms."

Kate slowly closed the book. She could feel her cheeks flushed with the heat of her oncoming arousal. She knew how good of a writer Castle was, but this was amazing. If he could write sex that well, imagine what he could act it out. Kate placed her head against the cool marble stall as images of a naked Castle flashed in her mind.

"This is ridiculous." She thought.

This whole time she'd been fighting to keep him on the edge, to keep their relationship professional; and with one sex scene he had completely broken down her walls and caused her to crave nothing but him.

Grabbing her bag from off the floor, she placed the book inside. There was no need to mark the page; she would remember it for months to come. As she left the stall to head home she couldn't help but wonder. Castle has always been a magnificent writer with a brilliant imagination. He combined what he learned in real life with what he dreamed to create complete works of art. Kate was dying to know whether Castle had dreamed that scene late at night, or experienced it with another woman.

Kate's fist clenched at the thought of Castle with another woman. He did have a lot of groupies, there was no denying that. Not to mention the mob of well-off woman just itching to get in his pants. Yet he had never mentioned being with other woman since their partnership. She had questioned him here and there when he returned on a Monday slightly bedraggled and drawn; but he had always explained the situation to her or avoided the question with flirtatious remarks. The chemistry between the two was undeniable, however Kate could not be sure if Castle really felt the same way about her as she did him. She was worried that if she revealed her feelings to him, he would simply play along so that they'd sleep together, and then be done with the whole thing the next morning.

With sudden determination she changed lanes and drove her way over to Castle's apartment. She was quick to march down the hall and into the elevator, pressing the button for the 8th floor. She tapped her toe on the steel floor, more out of nervousness than impatience. As the elevator binged her arrival she practically jumped out of the elevator running directly into Castle.

" Beckett? What are you doing here so late?" Castle seemed genuinely surprised to find his beautiful muse approaching his door.

"I know. You finished the book didn't you? So, how was it? Satisfying enough for you Kate?" he grinned in anticipation, watching her lips as she attempted to find the right words to say.

"I well, no I haven't finished the whole book yet." Castle did his best to hide his disappointment as he glanced down at his feet.

"I did finish reading that..umm sex scene you wrote. The one between our characters?" Kate watched Rick's face as she bit her lip, awaiting his response.

Castle smiled at the thought of Beckett coming over simply to tell him she had finished reading their "steamy" scene together. She must have thoroughly enjoyed reading it for her to come to him like this.

"Oh you did did you? And? Did it meet your standards Beckett?"

"Actually Rick, it was one of the most amazing things I've ever read. How did you come up with something so…"

"Sultry? Sexy? Hott?" he offered, as Kate rolled her eyes at him.

"Truth is Beckett, it came from up here." Castle said pointing to indicate his head "And from down there too" he joked, gesturing to his package.

"So you made the whole thing up? You haven't… experienced something like that before?"

Castle curiously glanced at his partner. Was she jealous that he might have experienced such a sexy scene with another woman?

"No Kate, I haven't. And by the sounds of it, you haven't either. Care to change that?"

Before Kate could even respond, Rick had her in a passionate embrace, hungrily kissing the lips he had been waiting months to kiss. Kate broke away to gasp for breath, stunned and delighted at this recent development.

"Castle, I… think I might be falling in love with you" Kate admitted, biting her lip and glancing nervously down at his chest. Castle sighed the happiest of sighs and placed his lips upon hers once more.

"You don't know how happy I am to hear that detective. You should know that not only have I been falling, I'm now completely in love with you."

Kate smiled one of the biggest grins Rick had ever seen before placing a tender kiss on his lips. She grabbed his hand, leading him through his apartment door. They made their way into his bedroom before Castle turned to lock the door behind them.