Hey everyone! This is my first story i've written about Castle. Actually this is the first time i'm using this website to upload anything but i'm slowly getting the hang of it. I'm hoping to continue this story for a few more chapters. Let me know what you think! :)

Disclaimer: I do not own the following characters...yet ;).

"Have you been here all night?" Beckett jumped at the sound of Castle's voice. She hadn't even heard him come in.

"Was that really necessary?" She looked away from the murder board and at Castle who was eyeing the board, two cups of coffee in hand.

"Was what necessary?" he looked over at her and handed her a cup.

"Thanks," she said quietly and went on to answer his question, "Scaring me like that."

Ignoring her answer he looked up at the murder board again. "You know, what if our vic was an undercover government agent? That would explain alot."

"Really Castle? You're sticking with that theory again?" Castle look down at Beckett and saw that she had just finished rolling her eyes whilst trying her best not to smile.

"One day I'm going to be right. And when that day comes—"

"It won't." Beckett interjected.

"When it does—"

"Don't bother Castle. I don't want to hear another CIA theory while you're here. Got it? Cause if you do, I might just have to shoot you and right now I could really do without the extra paper work." Beckett kept her eyes on the board as she spoke, sipping her coffee in between sentences to hide her smile.

Castle didn't bother to hiding his own smile as he continued to stare at the board. After a few minutes of silence he decided to sit down at his usual spot beside Beckett's desk. That caught Beckett's attention and she turned her back on the murder board to see what Castle was up to.

"What? No more theories?" She smirked, amused at his silence.

"Oh, so now I've been granted permission to speak? Have you already forgotten about your promise to shoot me?" Castle loved to get playful with her. She was always so serious and uptight about whatever case it was they were working on and he felt like it was his duty to lighten up the mood a little. Today he'd succeeded. His triumphant smile demonstrated just that as he stared into her emerald green eyes.

This was the part that Kate especially loved. The part where Castle thought that he'd won their little competition or whatever it was. Some people (like Lanie) had called it flirting. But Beckett knew better than that...or did she? She pushed that thought aside as she strode up to her desk planting both her palms on it while leaning in close to Castle. It took a lot more concentration that it should have to keep her from staring at those gorgeous pink lips of his. There were a couple moments of weekness where she glanced down at them but quickly brought her eyes back up to his blue ones. She was now inches away from his face, close enough to feel his breath on her lips. She held back a shudder. A smile on her lips as she whispered, "That's never stopped you before."

Maintaining her posture for a few more seconds was key. She was being a tease and she knew it. Just a few more sec—.

"Yo Beckett. One of our suspect's alibis doesn't..." Esposito trailed off mid sentence as he and Ryan entered the 12th Precinct and saw Writer Boy and Beckett in what seemed to be a very intimate conversation, or even more than a conversation. He and Ryan exchanged looks, unsure whether to go right back into that elevator and give them some space or to continue standing in front of Beckett's desk.

Castle and Beckett maintained their intimate posture but turned their heads to see Ryan and Esposito looking down at them with funny expressions on their faces.

"Should we come back at a better time?" Ryan asked.

"No."

"Yes."

Their answers were simultaneous. Beckett saying "no" and Castle saying "yes". At that exact moment Castle had turned his attention back to Beckett, while she decided that it would be a good time to straighten up. In the process they both ended up bumping each other's foreheads with their own.

Ignoring Castle's cries of pain whilst rubbing his forehead, Beckett focussed her attention on her boys. "Which one?" she asked, curious to find out which one of her suspects had lied.

"Kaitlin Lee," Esposito replied as Ryan handed over her file to her. They continued to exchange looks as well as glances to and from her and writer boy.

"The wife?" Castle asked still rubbing his forehead.

Beckett ignored him and the boys as she thought back to her brief interview with their suspect. Kaitlin had been genuinely upset about the news of her husband's death. She was with her brother at the time of the interview and had said that she had been at work around the time when her husband had been shot. There was no evidence or motive so far to suspect her of the crime but a fake alibi could mean that she was guilty.

"Yeah, we had uniforms check her apartment but it was empty and she's not answering her phone. We got a hit off one of her credit cards 20 minutes ago at one of the convenient stores next door to a hospital," Ryan explained.

"Good work. Have uniforms canvas the area and pick her up for questioning," Beckett ordered.

"We also—"

"On it." Esposito interrupted Ryan, giving him a look with raised eyebrows as he hurried off towards the elevator with a puzzled Ryan following close behind.

Beckett pulled out her chair and sat on it. Her thoughts of why Kaitlin would lie about her whereabouts that night were interrupted by whom else but Castle.

"Ow. Your plan to avoid paper work might have just fallen through Detective Beckett. Wait till I report to the captain how hard we banged."

Beckett slowly looked up from her from her desk at Castle, one eyebrow raised and half a smile forming on her lips. He's triumphant smile was quickly erased as he realized what he'd just said.

"Banged heads," Castle paused, "somehow that sounded way dirtier than it did in my head." Beckett shook her head but couldn't help that the smile on her lips was growing wider.

Please review! Let me know what i can do to improve this story and any ideas you guys have for future chapters!