Thank you all for the great response to the original story Nikki Heat. It was a lot of fun to write. Here is the sequel which takes place the next day at the Precinct. I hope you enjoy it. Gregg.

Disclaimer: I don't own, or profit from, these characters or franchise. No copyright infringement is intended.

Kate Beckett sat down at her desk at the Precinct and glared at all the paperwork that was in front of her. The case had been closed and now came the dreaded paperwork. It didn't help that her mind was very much not into it and was focusing, instead, on what she had done the night before to Castle. She was also dealing with the reality that she had let him see her in nothing but a sheer black g-string and sexy leather boots. Talk about a revealing picture for his unbelievably overactive imagination! And to ride him until he shot his load in his pants like that? She shivered as she recalled her own delicious orgasm when that happened.

How was she going to react to him when he got to the Precinct? She wasn't so sure. A part of her wanted to keep up the Nikki Heat persona with him and drag him into the locker room so she could screw his brains out, but the more rational part of her mind told her that she needed to play it cool. Tease him a bit and let the issue of sex and lust play itself out more naturally. She'd realized something the night before, and that was that she did indeed want something to develop with Castle. Sure the man was annoying and childish, but she'd also seen something the night before that she hadn't expected. He'd obeyed her boundaries. Not once had he removed his hands from under him and went to town on the mostly naked female body grinding on him. That meant something. She may not be a psychic, but she knew how to read people. Castle respected her. Even in a role playing scenario, he had respected the boundaries and her.

But did that respect have its limits? Was he biding his time and acting appropriately until he was able to get some? With the lusty playboy types that was always a possibility, and while she was definitely no prude and enjoyed some carefree sex now and again, she had a feeling that with Castle the possibility for something more was definitely there. Getting in her pants was not the primary focus of his attention. That much she was sure about, even in the face of all the flirting and innuendo they engaged in from almost the first time they'd met.

Another factor in her mind was the impact he had had on her for a number of years, despite having only known him personally for a few weeks. His books had played a significant role in her dealing with her Mother's murder and getting through the emotional quagmire that had been her constant demon for nearly a decade now. She was a devoted fan, though she would never feed his ego by admitting as much. Was her lust filled attitude, which played out so forcefully the night before, a result of her adoration of his books, or was it genuine? Were her feelings of genuine friendship, despite the constant need to put him in his place, really from the actual person of Rick Castle that she was getting to know, or from her perceptions of Rick Castle the famous author?

God it was such a mess! She had enjoyed the night before. There was no getting around that fact. But this was a place of work, and serious work. She could only imagine the repercussions if she were to do anything so wildly unprofessional as to yank Castle's chain so much that he was undeniably flustered and saluting every second. A reprimand from Captain Montgomery was the least of her concerns if that were to happen.

"I think you should know you will be getting a dry cleaning bill," Castle's smooth voice interrupted her thoughts as a coffee magically appeared in front of her.

She whipped her head around and saw him sitting in his now traditional seat next to her desk. "Huh?" she said, a little confused as she hadn't really paid attention to what he'd said.

"A dry cleaning bill, Detective Beckett," Castle said with a wicked grin. "You left me in a rather..., how shall I put it..., sticky state last night."

Beckett's eyes widened. He hadn't actually just said that here, had he? But there was that wicked look in his eyes right there next to her. He had! Alright. The gloves were off now! But she was no Nikki Heat here. She was Kate Beckett and he was going to learn that she was one woman who never backed down from a challenge. She got a wicked look of her own and responded.

"I'll be more than happy to pay for your dry cleaning, Castle," she told him, a small sultry tone in her voice. She made sure that no one nearby was listening. She leaned a bit closer. "I think you should know that I am wearing another g-string today, Castle, only this one is red. Blood red."

Castle about had another stroke. He instantly placed his jacket over his lap, Mr. Happy having decided to make an appearance after that comment. Before he could squeak out a response she added one more bit of explosive imagery.

"And a matching bra to complete the set," she told him, the same sultry tone at work, but quiet enough that only he was privy to what she'd said. She looked down at his jacket and smiled. "Something you feel the need to hide under there, Castle?" she teased.

"I won't even dignify that with a comment," he managed to say with a bit of dignity left. Teasing and joking around was one thing, but giving him a raging hard on right here in the Precinct? That was so unfair!

"Yo, Castle!" Esposito called from the break room. "How do you work this thing?"

Kate smiled. "Go on and show those boys how to use an Espresso machine," she told him. She leaned in close once more. "When I get done with this paperwork I'm heading up to the gym to work out if you wanna come keep me company," she told him.

Castle whimpered. "You are thoroughly evil, Beckett," he told her as he stood up with his jacket squarely in front of him.

She smiled a satisfied smile as she watched him walk, albeit a bit awkwardly, to the break room where the guys were waiting for him. Being evil was fun. She got back to her paperwork.

A/N: This will have a couple more chapters to it. Next up will be the gym. I hope you enjoyed this first chapter. Gregg.

A/N2: This story will be more focused on Beckett continuing to drive Castle a bit nuts. The third story in the series will see Castle getting back at her when she least expects it. I have decided that this storyline deserves a series of stories. Thank you for all the interest. Gregg.