As this is an AU story following the same kind of path as the series, you will find patches of story from the show and it might be changed here and there for the sake of this story so jump those patches if you wish. This story will be basically twisting with the series. It might also be a spell between loading new chapters as I work and am studying. I'm also writing bits that relate to Season 4, and bits that I get inspired by, but I need to post in order of eps and seaons for this to make sense. Disclaimer – I don't own the characters etc. Thank you for the reviews and idea via PM. Some good ones there. Enjoy.

Chapter 5

"Boy, oh boy, oh boy," Kate expelled, slumping back in her office chair. She'd slept a half hour past the alarm and got ready for work in what she considered warp speed. After Rick left was probably the deepest sleep she'd had in a while. They'd barely had two hours of sleep, too captivated and interested in each other to both with rest.

She desperately needed coffee she had bought, but she should have bought breakfast as she was starving.

Alone in the bull pen with her take away coffee cooling on the desk, she closed her eyes allowing herself to drift of recalling their night together. She couldn't think about much else to be honest. The first thing she remembered thinking was how well they fitted physically. Her mind was a blank canvas of thoughts for hours, but she was filled with a memory of ecstasy, bliss, shaking, trembling, of crying out his name, entanglement, hugging and the best intercourse she ever experienced her entire adult life. Her body ached, blissfully ached.

Today, Beckett lived with a body that was spent. It was a biological highway of nervous energy buzzing, trembling and pulsing through every cell, draining the last of the physical energy that was left. Every muscle had pain when she moved, but in a great way. She gazed down upon her tall slender body, that had never been serviced so spectacularly as last night, all night. The writer certainly had skills beyond putting words on paper. He didn't rush, took his time and he was right into women. And talk about large claims.

"Wow," she unconsciously murmured, a naughty smile creeping over her face. "Yep. Large." She was rather fond of that part of him.

She was exhausted, but overall, she felt alive, felt capable of running a marathon with ease: could jump a tall building, soar into the sky. She felt bouncy even if she was draped on the office chair imitating a wet rag. Blame the pheromones. They were multiplying by the second and flowing through her veins like a drug. A very addictive substance. If there was a thing that measured pheromones, and perhaps there was one already, then her reading would be off the dial. Totally out of this world. This hormone overflow was far better than any drug she'd experimented with in her partially ill spent youth. The writer had blown her mind.

She burst into giggles. Her hand covering her mouth.

Kate sat up. Stifled the laughter. She hadn't meant for that to happen.

She picked up the coffee cup, glanced about her in the hope no one was close enough to have heard her spontaneous outburst. It had sounded giddy and girlish. Un-Beckett- like in deed. No one had noticed. Nobody cared anyway. She flopped back on the chair. Her mind made a quick beeline back to where it wanted to be. Her bedroom with the famous writer she had shagged all night long. All night – just to be clear. She grinned and tilted her head longing to be back there.

Just before dawn, Rick had kissed her goodbye promising he would see her again. Half asleep, she had been filled with a sense of injustice that he was leaving so early, but it was fair that he be home to see his daughter off to school.

Going back to the he is famous part. Although he'd make it very clear he wanted to date her, would he be interested in doing so today? Also, if he did want to go on another date when would she hear? He'd said something about bringing her coffee later. She'd been semi-conscious at the time he'd left the apartment but she was quite sure he'd said the words coffee, bring and later in one sentence. She furrowed her brow. The case was closed. Why would he bring her coffee? When was later?

Maybe, she should consult Lanie about this. The doctor was a dating connoisseur which also meant she would have the answers. Experts had the answers. She picked up her phone to call Lanie, then paused. If she told Lanie she had gone on a date with the author, that she had been a total bitch to, that would look bad. Lanie would want all the details, even the juicy stuff. Right now, she didn't want to share any of it, the date, the meal, the venue, the chemistry and for fuck's sake she didn't want to share the details about their time spent in the bedroom. That was their secret. Actually, she didn't want to burst her little love sick bubble with other people's comments and feedback. She was enjoying the float in her bubble.

"I really was a bitch," she whispered to herself, recalling a few of the things she'd said to Rick Castle in the hope it would dissuade his efforts to get in her pants. She had spent days trying to be rid herself of him. Who'd won that round? She smiled, feeling the ache and soreness of her bits. She may have lost, but she certainly didn't feel defeated.

Decision was made. She wouldn't tell Lanie she went on a date. She wouldn't tell anyone. But would Rick make contact? What was the time frame for sending after sex text messages? She had no idea. Dating wasn't her thing really. She had surprised herself when she had sent Rick a message. She'd done that in a weak moment.

"Damn. Lanie would know this sort of shit." She closed her eyes and weighed up the options.

Keep it to myself. If I tell Lanie, she will tell Esposito cos those two seem to have something starting the way they eye each other off. Tell Ryan and he will tell Esposito who will tell Lanie. That will result in Lanie being pissed because she didn't hear it directly from me.

Kate opened her phone to check if she had received a text messages from Mr Castle in the past 10 minutes.

He'd texted her.

Kate sat up and fiddled with the phone until their thread of texts was up. She grinned. The butterflies in her chest fluttered madly.

Best date eva. Thank you, Kate. Are you open to topping that one with another? Always, Rick.

Okay. She now had the answer about how long she would have to wait for a second date. No long.

She tapped back, unconsciously smiling, You're pretty sure about that second date, Castle.

She hit send, hoping it wasn't too stand offish. She saw the bubble appear indicating he was busy writing some whimsical response. Here it came.

Sure as I am the moon will be in the sky tonight.

Kate Beckett grinned uncontrollably. She tapped back, I don't know if you handle another hot steamy …

The elevator tinged. Kate sat up too quickly. She accidentally hit send and she flipped the phone over setting it down on the desk. She reached for her coffee. The voices of Esposito and Ryan debating about last night's game came from the foyer. She started to scan her emails waiting for the boys to pass her desk.

"Beckett. Morning, Chica," Esposito cheerfully said as he passed her desk.

"Espo, how'd your team do last night?"

"They won."

"Morning, Kate," Ryan greeted, smiling at the detective who had a sip of coffee. She then put down the cup and sat back to watch the boys settle in for the day.

"Morning Kevin." She said, glancing down to her phone that buzz with an incoming text.

He paused, studying her face. She had a pleasant expression on her face, seemed unusually docile for this time of the morning, and her pupils were somewhat dilated. But she looked like a child that'd been caught with her hand in the cookie jar.

She was also relaxed with a dreamy look in her eyes. Beckett, relaxed. Now that was something different. He could almost see her sitting back against a bed head, smoking a cigarette after having great sex. Like in the old movies.

"You look different, Beckett," he casually said.

"Different? How?" She glanced between the two men who were studying her. She felt her cheeks burn and her right hand unconsciously found its way to her clavicle.

Esposito spoke up. "Yeah, Beckett, Kev's right. If I didn't know better I'd say you got totally laid last night." He gave a hearty chuckle.

Ryan coughed up his coffee then laughed nervously. He put his cup down and reached for a tissue to clean up his mess. He was clearly waiting for her to bite the bait and Esposito was smirking like a smartass, waiting for her reaction.

"Who was the victim, Chica?" He teased, "Did you let him go or shoot him afterwards?"

Kate stared at Esposito her tongue pressed into her right cheek to hold back the laughter. She had the biggest urge to jump out of chair shouting, 'Yes! You're right! I fucked Castle's brains out and it was the best sex I've ever had!' but she gripped the arms of her chair to keep herself in it and maintained her line of vision on Esposito, trying her utmost not to crack under the pressure. When she was ready, she replied, "You're wrong, Detective."

She wouldn't believe herself with the tone of voice that came from her mouth.

"No, I'm not wrong. You've got that glow all over you… I 'm a detective, I know these things."

"This time you're wrong, and victim? What am I, a black widow or something?"

The boys laughed.

"Who was it, Beckett?"

"I spent the night in bed reading a book. Unlike you Espo, I can read."

"I can read. Prefer to see the movie," Esposito grinned, "I know that look, Beckett." He pointed at her face, "About time you got properly laid, Chica," he said then walked off toward the breakout, grinning at her. He was pleased his partner had a good night, whatever it was she did and that he'd had the opportunity to stir her up a bit. He also knew her limits, hence why he walked away.

"He's only taking a stab in the dark with that comment, you know, Beckett," Ryan said with caution.

"I know." She watched Esposito pour himself a coffee. Esposito took enjoyment out of teasing her and she enjoyed every bit of it. He kept glancing at her, giving her smart ass looks. She gave him the death stare.

As he walked back to his desk, he detoured to Kate's. He stopped, and stirring the sugar into his coffee, he seriously said, "If he hurts you, Beckett, so much as messes with you, I promise you, I will go take him down." He nodded.

"You're suggesting there is a he, Espo. Anyway, I have a gun and I can take care of myself."

He smirked and turned about enough to see Ryan who was anxiously tidying his desk.

"I'm only a call away," he said, "Is Castle coming back or did you shake him off?"

Kate felt her cheeks heat up, when she thought about how much his body had trembled while she had been pleasuring the author, "Oh, I think I shook him up, off."

"He was fun to have around," Esposito replied totally missing the error she had said.

"This is a Precinct, not a playground," she reminded deciding it was time to end the conversation before she spilled to the guys."

Beckett continued with her paperwork. The team needed to get the file wrapped up and signed off by the Captain so they could take a couple of well earned days off. She settled into writing her reports.

The Captain arrived just about 10.00 am, after an early and lengthy meeting at 1PP. He muttered a good morning to everyone on his way into the office. Beckett, distracted by his arrival, saw him pull out his laptop

"Beckett. My office. Now!"

Startled, she closed the file she was writing in, and looked to the boys who lifted their gaze to her. She signaled she had no idea. She stood and hiked it into Montgomery's office.

She hung onto the door frame, "Sir?"

Montgomery gave Beckett the once over then said, "I just got a call from the Mayor."

Beckett stepped right into the room and waited for the Captain to continue. The Mayor? That was unusual.

"Apparently, you have a fan."

"A fan, sir?"

"Rick Castle. Seems he's found the main character for his next set of novels. A tough but savvy female detective."

"I'm flattered?" She kind of asked, wondering how the hell she actually felt about the news. The writer hadn't said a word about it when they had been together at dinner. He hadn't mentioned anything all night. It made her feel a little nervous.

"Don't be. He says he needs to do research."

"Oh no." Kate stated.

"Oh yes." The Captain confirmed, watching a mini-breakdown take place within the detective. It was amusing him no end.

"No way." Kate said furrowing her brow.

"Beckett..." he warned.

Kate inhaled deeply, getting the feeling that she'd made a huge mistake last night, "He's like a nine year-old on a sugar rush... totally incapable of taking anything seriously." She swallowed, hearing her own lie. He had certainly taken his date with her seriously, and the parts when they had made love. He certainly did man up those times. She cleared her throat pushing those memories down where they were safe.

"He did help solve the case. And Beckett, when the Mayor's happy, I'm happy.

"How long, sir?"

Montgomery looked from Kate and nodded over her shoulder. "That's up to him."

Kate followed her Captain's gaze, her eyes widening when she clapped eyes on Rick Castle, the man she had been straddled upon about six hours ago, who was sitting on the edge of her desk.

Castle grinned and waved then continued to talk with the boys. Beckett turned away showing Montgomery her son-of-a-bitch expression, but there was a hint of a smile. Montgomery missed it because he was walking to his desk.

"Oh, no, Sir."

"This will be good for you, Beckett. You now have a partner to work with."

"Sir, I have Esposito and Ryan."

"And now Castle." He said.

"Is this even allowed? A writer following a cop?"

"If the Mayor says so and the Mayor says so. Castle needs to sign a waiver the NYPD lawyer is drafting up as we speak, and I've been advised that Castle's lawyer will be here within the hour. Let them use a room. So, you have yourself a new Partner, Beckett. Don't let him get shot on his first case, will you."

"I'll make every effort, Sir," she replied with gritted teeth.

"While you're waiting, you'd better give him a debrief on health and safety, bullying all the induction stuff."

"Yes, Sir. Excuse me."

She left the office and paced rapidly to her desk. She grabbed Castle's left forearm. "Come with me, now." She kept going.