I have never seen Kate so anxious before, but then again she's never been without Dad this long since they have been together. She is just pacing back and forth across the loft. "Kate?" I ask.

Her head turns to me and she stops her pacing. "Yes."

"Um I have been thinking and I should ask Dad if this is okay too, but since its more about you and me I figured I should ask you alone and I've been thinking about this since you came to the apartment after Dad left." I look at her hoping she is keeping up with the rambling.

"Okay, what is it you wish to ask me Alexis?" Kate asks walking closer to me.

I look to the floor not sure if I could ask her if I looked into her eyes. "I was just wondering if it would be okay if I can call you…" I take a deep breath and look into her eyes knowing I had to for her to believe me and for me to be sure it's what she wanted.

"Call me what Lex?" Kate asked confusion and concern all over her face.

"Mom." I said quietly and look down again.

"Mom." She whispered in shock.

I nod and look back up at her and see the smile and the question in her eyes and face.

"Oh Lex." She says and hugs me close to her. "If you want to call me mom I would be honored." She pulled away a bit and continued. "But only if your sure, if you aren't 100% sure then I don't want you too, okay?" she looks at me serious.

"I want to, mom." I smile and I see her smile too.

"I love you Lex." She hugs me again.

"I love you too, mom and I'm really happy that Dad is marrying you." I whisper ad she still holds me.

"Me too." She holds me a bit tighter and plays with my hair a bit and I can feel the tears start to swell in my eyes. "What's wrong Alexis?" Kate says holding me to her tightly as I cry into her shoulder.

"You're the first person other than my Dad and Gran to hold me like this." My voice shaky as I tell her.

"Oh honey, I'm sorry." She says and starts to pull back, but I hold on to her tighter.

"No." I say and wrap my arms around her. "I like this, you're my mom in more ways than one and I know not by blood, but your more my mom than anyone and my real mom is like a crazy aunt I can see once a year or else I'll go insane." I tell her and she laughs and I start to laugh too and we're all of a sudden laughing and we can't stop.

"Katherine Beckett what in the world did you give my daughter and what in the world did you take and how can I get some." I hear the voice from over Kate's shoulder.

We pull apart and Kate turns to Dad. "Rick." She says smiling wide as she runs to him and higs him. I can see his arms come around her and he holds on tightly to her. His face buried in Kate's neck smiling. He pulls back a bit and kisses her and they smile at each other. "I missed you so much Castle."

"Castle? I missed you too then Beckett."

"Sorry, Rick." Kate says and rolls her eyes as I do too; I realized I've picked up some of her habits since she's 'moved in' to the loft.

"Dad." I say and run to hug him as Kate and Dad pull away from each other.

He hugs me and kisses my hair before running a hand through it. "I've missed you pumpkin."

"I've missed you too dad, but mom was so much fun. We had sleepovers, and she took me out to lunch a lot and…"

"Meredith was here?" he asked anger in his voice.

"What? No." Both Kate and I said and then I remembered what I said and I could feel the heat rush to my cheeks and I can see Kate's turn a bit pink as well.

"You said your mom." He said confusion all over face.

"That would be me." Kate said raising her hand a bit and blushing.

"You."

"Yeah, I was going to ask you if it was okay to call her that and I asked her and she said if I was 100% sure than she said I could call her mom." I explain.

"But if you don't want her to call me mom than…"

"No, no, it's up to Alexis and personally I think it's great. I love you guys." He says and hugs both of us.

"Love you too." Kate and I say at the same time. We look at each other and laugh again.

"So what's this about sleepovers and lunch dates and seriously what are you two on?" he asks laughing along with us.