A/N: The final chapter…

Ch 17: Peanut Butter and Jelly Sandwich

Almost two months later…

It had been over two weeks ago since Kate Beckett had returned to work, Castle, as always, 'shadowing' her. All in all things went pretty well. They had just closed another case the day before and they were currently on their way to the precinct to do some paperwork. Or at least, she was. Rick was just tagging along as usual.

It was kind of funny actually, the way she thought about 'they' and 'them'. Somehow the idea of Rick and her being together had become so normal to her that she had made a habit of using terms like 'we' instead of just saying 'I'. Most of the time she stayed over at his place, since she had basically lived there during the time that they had mono. She had gotten used to it, although she wouldn't exactly use the words moving in yet. Theoretically she had pretty much already done that, but she couldn't just let go of her apartment yet. She had came out of her comfort zone enough, officially moving in with Rick was just a bit too much… for now at least.

Getting back to work had been… challenging at first. Now she didn't only have to keep Rick under control, but Ryan and Esposito as well. For their sakes she had pretended not to notice the exchange of money and the silence that fell when she asked a question about it. She was a detective, and she was pretty sure that they had some large bet going on about her and Rick.

That was another thing. Sometime during the past couple of weeks she had completely starting to think about his as Rick. Of course she still called him Castle at work, to keep it more professional, but she didn't think of him as Castle anymore. Just Rick.

Rick shot Kate a side-glance, who seemed to be deep in thought. They drove to work together most of the time. Actually a lot of things had changed between them. But then again, some things stayed the same. Like the fact that she still wouldn't let him drive…

Suddenly he got ripped out of his thoughts when Kate abruptly turned the car over to the sidewalk, almost giving him a whiplash.

"Kate are you al−" Before he could finish his question, Kate got out of the car and ran towards the nearest trash can.

He got out as well, and followed her. She was throwing up in the trashcan. Worried, he walked over to her and held her hair. When she stopped he asked, "Are you okay?"

"Yeah, I don't know what happened. Suddenly I just felt−" She leaned forward to the trashcan again, and continued throwing up. When she was done, she walked over to the car, got in and grabbed a bottle of water. She drunk it and let the fluid wash away the bitter taste on her tongue.

Castle took the seat next to her and said, "Maybe you should go home, get some rest. The paperwork can wait till tomorrow."

"I already told you, I'm fine. That was just− Well, I don't know what it was but it's over now and I feel fine." She tried to convince him.

Another thing that hadn't changed, Kate Beckett was still stubborn as hell.

Castle shook his head before he admitted defeat and said, "Okay, but if you feel only a bit nauseous or sick, I'm going to take you home."

"I'm fine." She said, sounding more like she was trying to convince herself than him.

"Sure…" He said, unconvinced.

"I am." She said as she started driving again.

"Hmm hmm." Castle murmured in confirmation.

Kate, who was getting quite annoyed, said, "Seriously I am!"

"Well, I didn't say you weren't, did I? I even agreed with you." He replied.

"Yes, but you sounded like you were doing to exact opposite." She countered.

"Hmm hmm."

"Stop that!" Kate said, snapping a bit.

"Stop what?" Castle, who had started to grin, asked.

She let out a loud sigh. "That− thing you're doing… You know what I mean!" came the vague reply. "And stop grinning like that, this isn't funny!"

Instead of stopping, Castle grin grew even wider at that. "You know when you said I was an easy mark…?" He asked her, his grin never faltering.

"Yes. Why?"

"You are totally an easy mark too." Castle said.

"No I'm not."

"Yes you are."

"Am not." Kate said.

"Are too."

"I am not an easy mark." She told him.

"It's alright Kate, I think it's kind of cute." He replied teasingly. Meanwhile they had reached the precinct. Kate parked the car, got out and walked towards the doors of the 12th precinct, leaving Castle behind.

Not that she was mad at him though, somehow it was really hard to stay mad at him. No, the reason she was doing this was because she still loved watching him squirm a bit. Plus, she was late because of the whole throwing up incident, which she rather didn't want to think about. She heard loud footstep echoing through the parking garage, running towards her. Suddenly she felt his hand tugging at her arm, shifting her around to face him.

Still a bit breathless from the run, Rick smiled at her. His warm, caring smile, the one she only saw once in a while. He leaned in and kissed her like he'd never done before, making all thoughts about work or the fact that she was supposed to act angry towards him fly out the window. His tongue trailed across her upper lip as her hands found their place in his hair. Hmm, he did have nice hair, she thought as she let her fingers run through it.

He let his hands go down from her lower back to her hips and finally ended in the back pockets of jeans. When he pulled her closer, she almost grinded into him, sending jolts of electricity through their bodies and he groaned softly, almost making him forget their were in a parking garage. Then, in desperate need of air, they broke off the kiss as they tried to steady their breaths.

"Kate?" He asked softly, almost a bit shyly.

"Hmm." Was all she managed to mumble.

"I love you." He said as he looked her straight in her eyes, his deep blue eyes full of sincerity.

She stilled for a moment, too shocked to answer. Of course, she had already figured out how she felt about him a long time ago, but this moment kind of took het by surprise. Even with all of that, she finally breathed, "I love you too."

The smile that then appeared on his face was one of the happiest she'd ever seen. Almost like he was glowing. Quickly he gave her a kiss, making sure they wouldn't get lost in it again, took her hand and walked into the precinct with her.

It was a reasonably quiet day. Kate did some paperwork, drank some coffee and that was pretty much all there was to it. Besides the overly excited Rick Castle of course. She was almost surprised she didn't see him frolic through the hallways. But, it seemed like a normal day…

That afternoon, Kate and Rick were eating lunch together in the break room. Castle watched in horror when Kate ate three peanut butter and jelly sandwiches.

"Why are you eating that?" He asked, still horrified.

"I don't know, I just wanted a peanut butter and jelly sandwich." She shrugged.

"You hate peanut butter and jelly sandwiches." He said.

"No I don't."

"Yes you do, you said so yourself." He replied.

Suddenly her eyes grew wide and she almost dropped her sandwich. She became a bit pale and ran out of the break room, grabbed her coat and left the precinct. Castle called after her but she was already gone. He decided to wait for her, he was pretty sure she'd come back.

After what seemed, and actually were, hours she Kate back looking a bit… fragile. "What is it?" He asked in his worried voice of his.

"You know the peanut butter and jelly sandwich?" She asked.

"Yes."

"My mother hated them too." She said and continued before he could speak. "But she totally loved them when…" She swallowed, "… she was expecting me."

Suddenly a realization struck him and he looked at her, not knowing if he should be happy or shocked. "And…?" He asked carefully.

She opened her hand that held a pregnancy test. "I'm pregnant." She whispered.

THE END

A/N: Okay, I know a totally evil ending. But, I might make a sequel to this one. What do you think? Either way I want to thank you all for the support, I totally loved writing this and I hope you liked reading this as well. You don't know how much it would mean to me if you'd leave one last review. And if not thank for reading! :D