AN: Okay so this is my first attempt at FanFiction, so kindness would be appreciated :) but I would be happy if you left some constructive criticism so I know what y'all do and don't like. So, just a heads up, I'm a sucker for fluff and Alexis/Kate moments, so there is A LOT of that.

Thanks :)
~Kaitlyn

Ch. 1

One evening, Rick was relaxing on the couch, while his new fiance, Kate, was nervously pacing the living room, constantly checking her father's watch. 6:30 p.m. Only five minutes since she last checked. Amused, Rick said, "Calm down Kate. She'll be here soon, and she'll love this. I promise."

Staring at him, worry present in her hazel eyes, she confesses her worst fear, "What if she doesn't want me to be a part of this family babe? You know she comes first. What if she doesn't want this... What if she hates the idea of us getting married? What if-".

At this, Castle jumps from the couch and wraps her in a hug, passion in his voice as he desperately tries to calm her. "No Kate. You don't think that for a second. She loves you." All of a sudden, their moment is broken by the door opening and a flash of red hair peeking around the corner. As she strides into the room, she heads straight for her dad.

"What's up?" she asks, genuinely curious, after seeing the clearly nervous expression painted on her father's "girlfriend's" face.

"Can you sit with us for a minute sweetheart?"

"Yeah dad... Is everything okay?" she takes a seat in the chair across from the couch, which Rick and Kate have already sunk into.

"Everything is magnificent sweetie," he tells her, "Kate and I just need to talk to you for a minute. So, you know I love you very much, and if you don't like this, well we'll work it out and try and find another option, one that you'll like maybe because we both love you so mu-"

"Dad spit it out. What's going on? What are you babbling about?" Kate eases herself from the couch and lowers herself down on her knees onto the spot of floor in front of Alexis's chair.

"So Alexis, what your dad is trying to say is... He proposed, and I said yes. If you don't like this, or if you want-" the rest of her worrisome rambling is cut off with a gasp, as the red head tackles her with a hug with enough force to knock her off her knees.

"I love this Kate. I really do. Honestly I've been waiting for this to happen! I'm so excited!" As Castle watches the interaction between the two most important girls in his life, he smiles, thinking to himself that he told her so. On the ground across from him, his two girls are still hugging.

Kate has tears in her eyes as she states, "Alexis, sweetie, I'm so happy you're okay with this. You always come first in your dad's life, and I wanted you to be happy with this." She said as she pulled back from her, staring deep into her blue eyes. The young woman just stares at her.

"Why would I not be okay with this? You make him happy. He's changed since he met you. Changed for the better. And,"she adds shyly," I've looked up to you since I was 15. I've always hoped this would happen. Why would you think I wouldn't?"

"Well," Kate starts," I didn't know if you wanted someone to come in y'all's life like this. And I promise you I won't try to take your mothers place Alexis. I know no one can replace her."

At this, Alexis laughs, saying, "Kate I think of you as my mom more than my own mother. You care about me just like her, maybe even more, yeah, definitely more, but unlike her you're here for me. You've helped me and my dad through a lot. And I love you for that." This time it's Kate who surprises Alexis with a hug.

"I'm honored that you think of me that way Alexis. To be honest, you always felt like more of a daughter to me than anything else. And I love you too Alexis, more than you can ever understand." All of the sudden the two women are knocked back to the ground as Castle throws himself onto them, a huge grin taking up his whole face.

"So, who's hungry?" The three laugh and they untangle from each other and race to the kitchen to start to prepare dinner, as a family.

Next chapter will be up soon, please don't forget to R&R, favorite, and follow.

Beta: Unipotato