Disclaimer: I don't own Castle or any of it's characters.

"Castle!" he heard her yell from the living room sitting in his study. Shit. What had he done. He racked his brains going over the last few days wondering what he did wrong. Nope nothing.

"What babe?" he asked getting up from his desk. She shot him a glare from her spot on the couch. Oops bad move she hated it when he called her pet names. "What's up?" he asks quizzically jumping over the back of the couch. Kate doesn't offer an answer just holding the book she was reading up to him. Not just any book but the new Nikki Heat book that was just released last week.

"You're still mad that I didn't let you read it before it came out? I told you I can't give my muse preferential treatment even if you are my girlfriend." Kate rolls her eyes.

"No, not that Rick. This." She says brandishing the book open to page 121. Crap he forgot to ask her about that part. The scene where Nikki and Rook have sex in the observation room of the precinct.

"Oh that." He says giving her a mischievous smile but deflating a little.

"Yea that part" she says folding her arms across her chest and glaring at him.

"Come on Kate I thought you wouldn't mind. It was pretty hot if you ask me." He says scooting closer to her.

"Wouldn't mind? Yea just have everyone doubting my professionalism."

"Your professionalism? It's fiction. No one is going to think that happened in real life." He said wrapping an arm around her shoulders. She wasn't having any of it though, turning abruptly to face him.

"But it did happen Castle!" she says exasperatedly. He can't stop himself from chuckling as he looks down at Beckett with her bottom lip pushed out.

"No one knows that it actually happened though." He says running his fingers through her hair.

"Sure Castle"

"It's not like it's the first time Nikki and Rook have had sex or anything. Why is it a big deal?"

"God Castle." She said shaking her head like he wasn't getting the point.

"Wait a second; you're not upset about what other people will think. You're mad because I wrote about something that we actually did." He announced as if he had just figured out who the killer was.

"Yea, maybe a little. I don't know I just kind of thought it would be something between us. Not us and the millions of Richard Castle fans." She said a little embarrassed looking away.

"Kate," he said turning her face gently to look at him. "I'm sorry I guess I didn't really think about it. But if it makes you feel better the Rick and Kate version of that scene was way hotter than the Rook and Heat version." Castle turned to her raising his eyebrows suggestively.

She can't help but laugh, "Okay well can we agree that no more "Rick and Kate" scenes make it into anymore of your books."

"Yes, but I'll still need some inspiration." He says pressing his lips to hers.

"Mmmm. I might be able to help with that. I am your muse after all." Kate says beginning to unbutton his shirt. "The only problem is no more observation room sex."

"Damn. I didn't think about that, now people will be suspicious." Rick groans hitting his palm on his forehead.

"It's okay Castle" Kate says suggestively as she climbs into his lap. "I'm sure we can find other places." Kate begins trailing her lips up his chest. "The evidence closet…" she reaches his neck "parking garage…" she reaches his mouth "…holding cell."

"Best muse ever!" he declares as he presses his lips to hers.