Disclaimer: Nope I don't own Castle... sorry.

A/N: So I finally caught up with all the episodes and well this could fit in the anywhere in the time-frame of Season 2 or 3. No spoilers. Just a bit of fun. Please read and review. Oh also my first Castle fic and I'm not actually sure if i got the characterization right. So please let me know with your feedback.

Million Dollar Question

Kate watched as her two male partners and Rick Castle tried to stifle their laughter in the hope of not getting caught by the female detective, simply because none of them wanted to share the reason for their laughter. It was a task easier said than done though and Esposito had finally managed to get a straight face when Kate made her way over to the doorway of the coffee room where the trio stood.

"Anyone want to share the joke?" she asked, one eyebrow raised. Her question was met with complete silence. She assumed it probably had something to do with the very pretty, very attractive and very sexy blonde woman who had sauntered up to Castle earlier that afternoon and scribbled her phone number on his forearm with a Sharpie as she kissed his neck along with a promise that when they hooked up, it would be a night he would never forget, and from the expression on Castle's face, it seemed she was correct in her thinking.

What the Detective did not realise was that her eyes were flashing dangerously, a sign that she was less than happy. Ryan and Esposito rapidly came up with excuses to be at any place except near Detective Beckett leaving Castle to fend for himself.

"Please tell me you are not going to call her," Beckett sounded more annoyed than amused and Castle was quick to pick up on her tone.

"Oh come on KB. Did you see her, she's every guys dream," he said and it just served to annoy her more, something he was looking to do.

"She's half your age,…" she started but was cut short by him.

"You don't know her and yet you don't like her," he said and Kate found that he was in fact right – she was passing judgement on a woman she didn't know.

"I don't… " she began again, "whether I know her or not doesn't matter, you don't know her either."

"That's why I'm going to call her and ask her out on a date first. That way we'd get to know each other."

"She's barely older than Alexis!"

"And we're back to that."

"Do you intentionally go looking for conquests like her?" Kate asked before she could switch on her brain to mouth filter.

"Are you jealous, Detective Beckett?" Castle asked her, and Kate did not miss the humour that coated his voice.

"No, don't be silly. Why would be jealous of her? There's clearly nothing to be jealous about." She informed him, but Castle saw her eyes flashing and he spent enough time with Kate to know what she was feeling.

"Whatever you say, Detective Beckett," he said as he slowly walked to her desk and picked up his phone to call said blonde woman.

He felt Kate's presence behind him and he turned to face her, his phone still pressed to his ear.

"Something wrong, Kate?" he asked.

"Do they have anything in common? The women you sleep with? I mean besides the fact that they're all insane to want to sleep with you," and there it was again, the hint of jealousy in her voice.

"Yeah they do, actually."

Oh this was going to be good, she could not wait to hear it.

"They all ask me the same question on the morning after."

"When will I see you again?" she asked him.

"Nope, that's not the one," he told her.

"Then, what else could they possibly ask you, Castle?"

"Who's Kate," he replied before grabbing his stuff and walking out the office without so much as a backward glance.

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Have a great week ahead guys.