Disclaimer: Don't own Castle

A/N: So thank you to everyone who has reviewed, followed and favourited my story I am having so much fun writing this out of all my stories this is by far my favourite and it's just the beginning :) Just let me know what you think :)

She stood outside his door, taking a moment to calm her nerves she knew she would be fine that this would be like any other time just her and Castle were now together he was hers and she was his. She finally knocked on the door and was greeted by a cheery red head who had wrapped her arms around her torso "Detective Beckett I'm so happy you're here" Kate smiled and squeezed her a bit tighter "thanks for inviting me Alexis" she let go looking her in the eyes with a genuine smile she hadn't felt in a long time "and please call me Kate" the young red head simply smiled and nodded.

Kate removed her jacket and slipped off her shoes placing her bag down, while she and Alexis made small talk Alexis stopped for a moment to check to make sure her father wasn't near and turned to Kate.

"Kate"

She looked up and raised her eyebrows in response

"Thank you, for giving you and my father a chance it's good to see him so happy" she could feel her eyes teary up she just smiled "thanks Alexis, and I promise I'll do everything in my power to keep him happy" Alexis gave her a quick hug and headed towards the kitchen.

"Dad, Kate's here… Oh my god really?"

Kate noticed the sarcasm coming from Alexis's voice and raised her eyebrows as she headed towards the kitchen, then she saw him leaning over the stove with an apron on.

"Hey" she made her way around the bench he turned to face her and that's when she saw it he was wearing an apron that had the words 'Kiss the cook'. Alexis had made her way upstairs to clean up in other words she really didn't want to watch those two oozle over each other.

She raised her eyebrows giving him a questioning look and before he knew it she leaned in and kissed him slowly on the lips, once they parted their foreheads were resting against each other "hi" he whispered against her lips she couldn't suppress her smile.

"I missed you"

"Castle, it's been like 7 hours…. But I missed you too, but uh Rick"

He pressed his lips softly on her lips again and hummed against her lips in response

She mumbled the words dinner and pulled back, he went back to cooking with one arm around her waist looping his thumb through her belt loop of her jeans.

Martha and Alexis soon made their way down the stairs after Castle called out to them, as soon as Martha saw Kate she headed for her pulling her in for a lung crashing hug "oh it's so good to have you here Katherine, and to actually have you here" she tilted her head to the small bag she knew too well to be an overnight bag. Kate smiled into Martha's hug "thank you Martha, even though this will boost his ever growing ego it's good to be here". Both ladies laughed as they separated, making Castle turn on the spot.

"What did I do?"

"Oh nothing Richard, just girl talk"

"Oh my god seriously how much girl talk could you possible need"

Kate just rolled her eyes as they made it to the table Castle and Alexis had set the table Kate and Castle sat on one side facing both Martha and Alexis. They chatted amongst one another Kate and Castle stealing small glances at one another every few minutes Martha was amazed at how fast their relationship was building in the last two or three days. Alexis told Kate about her studies and college choices she saw Castle tense up from the corner of her eye when Alexis mentioned going to Oxford, she couldn't help but smirk. She loved Castles relationship with his daughter it was one of the many things that made her fall for him in the first place.

"You know as amazing as Oxford is and if I had the opportunity when I was your age I would have definitely considered it"

Alexis cut her off "I'm sensing a but…" Castle had his eyes glued to Kate who quickly glanced at him and placed her hand on his knee giving him a small squeeze to reassure him. She looked back towards Alexis to continue.

"But I don't know how easy it would have been to leave my family I mean Oxford is a long way away which is why I chose to study near home I mean it's okay to go to Oxford if that's what your heart desires. But there are amazing colleges right here in America, Stanford, Brown, I mean the list goes on, and from what I've heard from your father and from what I've witnessed in the last what three years" she quickly stopped to glance at Castle then back at Alexis "I'm more than positive you'll get into any college you apply for".

Alexis smiled up at Kate, she honestly didn't know what to say even her own mother never spoke to her like this with such pride and confidence "thanks Kate, fingers crossed I get into at least one".

"No need to hope pumpkin you know you will"

"Thanks dad"

Martha was sat in amazement watching the three of them talk about Alexis's future once dinner was over Martha grabbed her jacket and said her goodbyes she had a party to attend to a small get together for a play one of her closest friends has just finished being a part of.

"So Kate, what movie would you like to watch we have, How to Lose a Guy in 10 Days, Toy Story, Harry Potter and the Philosophers Stone, Bounty Hunter? Are up for viewing tonight"

"Ooh well I have to admit I am a massive fan when it comes to Jennifer Aniston"

"Bounty Hunter it is! We so have to have a FRIENDS marathon one day"

"Oh definitely, I could use a good Joey laugh"

Castle just cleaned up the table listening, to the two most important women in his life talking like they have been friends for years. He couldn't wipe the smile off his face. Alexis went up stairs to change into something more comfortable and Kate took this as an opportunity to sneak up behind him she snaked her arms around his torso, and hummed into the back of his shoulder blades. He turned around her arms still wrapped around him leaning down and kissing the top of her nose.

"Thank you"

"For what?"

"For talking to Alexis, during dinner for trying to convince her to stay just the fact that you two get along so well makes me so happy"

"Hey, you don't need to thank me it's my pleasure to be able to talk to her, for her and your mother to be happy about us two" she leaned in and gave him a soft kiss along the lips before quickly letting go and moving towards her duffle bag she heard him grunt and she couldn't help but laugh.

"Is it okay if I just pop this in your room?"

"Of course here I'll help you"

"Ah Castle its okay"

"I know I just, I want to"

She gave him a quick smile "okay"

They made it to his room and he quickly changed his jeans and put a pair of tracksuit pants on while Kate was in the bathroom putting her pyjamas on she glanced in the mirror to double check her lingerie. She wouldn't deny that she looked good, and couldn't wait to see Castles reaction god she just wanted him now, she threw a pair of loose fitted pants on then realised that she hadn't packed a top to sleep in she called out to Castle to see if he had a spare top and he handed her one without peeping. She loved how careful and sweet he was being once she put the top on she realised it was another top with writing this one read 'Shiny' she laughed in the mirror before making her way out to meet Castle and Alexis who were set up on the lounge Alexis sat in the recliner closer to Castles side. Kate sat on the same couch as Castle who placed some of the blanket over her.

Half way through the movie Alexis had decided to go to bed she had school in the morning and it was getting close to 10:30pm Kate was still shocked that Alexis actually stuck to her own bed time. After saying their good nights Kate settled back into his side, he started slowly rubbing his thumb on her hip raising her shirt well his shirt just a little. She felt her skin begin to prickle from the sensation of his thumb and the movements he was creating suddenly he felt something odd.

She knew as soon as he stopped caressing her side that he had found his surprise and she heard a feral sound come from his mouth.

"Kate" his voice was dark she wanted to play along and pretend to not know what he was talking about.

"hmm"

His breath was shaky "is that uh"

She started to move her hand up his shirt "mmhmm"

"So hot"

"Hmm really?"

"Jeez you're so going to kill me Kate Beckett"

"But what a fantastic way to die huh"

She was now straddling over him on the couch lips joining in a heavy mess "Rick"

"Hmm"

"Not in here, bedroom now"

He turned the TV off and carried her to his bedroom knocking into walls every now and then, until they made it to his bed once he placed her on the bed she sat up.

"Lay down Castle!" she ordered him to and he obliged finally actually listening to her after all these years. She went towards the bathroom and she heard him groan "Kaaaate"

"Easy cowboy I'll be back" she headed towards the bathroom leaving the door slightly open whilst she changed out of her comfy clothes into her black laced lingerie. Whilst Castle in the other room quickly closed his doors to his office, than locked the door to his bedroom lighting candles around his room he turned the lights off and quickly undressed himself down to his boxers. Quickly making his way back to the same spot on the bed he had pulled the blankets back and was now waiting for Kate.

He saw the door open as she nervously began to walk out he was speechless she was smoking hot, incredible. "Kate" it was a whisper and she just smiled they were doing this stepping into new territory that they would never be able to turn back and they both had never been so sure.