"So Detective Beckett, do you know anything about this mysterious woman my dad's seeing?" Alexis asked as they shared a pizza, staring at the television screen, Rick meanwhile resting on the other couch eating another pizza to himself as he listened into the conversation he knew Kate would find awkward. "It's just me and gran were starting to wonder about whether she really existed until he turned up with a hickey tonight, which by the way dad is disgusting, you're not a teenager anymore" Alexis moaned, Kate laughing as Rick sat up and glared at them.

"I didn't even though there was a woman Alexis, we don't really discuss our personal lives at the precinct, however much your father wants too" Kate smiled as Rick nodded, Alexis groaning as she continued to stare at her father. "So how long has there been a mysterious woman Castle?" she asked, biting into a slice of pizza to stop herself from laughing at his face.

"She's not a mysterious woman, she's just a friend who I have fun with and enjoy spending time with, also she's extremely good looking which makes it slightly better" he smiled, Alexis quickly chucking a cushion at him as she rolled her eyes at Kate who smiled.

"Dad, not everything is based on looks you know, there's more to it than that why do you think every other relationship hasn't worked out for you?" Alexis asked as Rick sighed, Kate biting her lip as she began to think about the playboy Richard Castle she'd read about and how she mostly likely was another Castle groupie. "For example, personality and things like that, things that are more important than just looks" she declared, Kate looking at Rick who was staring at her, noticing the worry that was covering her face.

"Well she's also intelligent and absolutely lovely Alexis, she's just very private and she doesn't want people to know, anyway I'm not particularly sure what we are right now, we're just enjoying each other's company" he explained as Alexis quickly nodded, hoping however that he wouldn't go into any more detail about his secret relationship. "And by the look on your face you don't want me to go any further into my sex life" he laughed as Alexis groaned and chucked a cushion at him, a smile covering her face as she watched the two Castle's glare at each other with smiles still painted on their faces. Hearing her phone ring, Alexis looked down and smiled to herself before excusing herself and leaving the room, Rick rolling his eyes quickly. "Young love" he sighed, climbing off his couch to move next to Kate who smiled at him. "Having fun?" he asked.

"Yes actually" she whispered, turning to hear the teenagers bedroom door shut before she stared back at him. "Is there any chance your mother is going to come walking in at any moment in the next five minutes?" she asked quickly as Rick looked down at the watch on Kate's wrist.

"Eleven thirty, it's still early for my…" he began before Kate moved her lips onto his, her hands moving through his hair as she straddled him quickly, smiling onto his lips as she moved away to breath, her eyes staring right into his. "Kate Beckett, you like the dangerous side of life don't you?" he whispered as she bit her lip again, feeling his hands move across her ass slowly, pushing her slightly closer as she laughed. "It's impossible being around you, you know that right?" he whispered as he pressed his lips against her neck gently, her head shaking quickly as she moved away.

"We can't leave any marks Rick, she's clever and she'll work it out" Kate admitted as he groaned. "I shouldn't have done it to you earlier, I'm sorry" she commented as she ran her fingers across the noticeable red mark on his neck, a smile covering his face at the feel of her touch on his skin.

"I know being branded by a beautiful woman is absolutely horrid, you'll just have to make it up to me on a later date" he laughed as she rolled her eyes and heard the door open upstairs causing her to slip off his lap and sit beside him, smiling at him as they both smoothed down their clothing trying to calm themselves down as Alexis joined them quickly. "Boyfriend by any chance?" he asked.

"None of your business dad" she declared quickly. "Hey you stole my seat" she moaned, Rick quickly sticking his tongue out at her as Kate rolled her eyes at him and smiled. "Anyway, your couch is the comfier one".

"Well this couch has the lovely detective with it Alexis" he smiled, Kate hitting him gently as Alexis laughed and sat herself down where Rick had been sitting. "That's so much better than a comfy seat" he added, Alexis staring at him with her eyebrows raised.

"I didn't think I was included with the furniture actually" Kate quickly commented as Rick sighed at her. "Anyway Alexis doesn't take up as much space as you so I prefer sitting next to her, also she doesn't talk the whole way through the film giving away the plot " Kate teased, watching the glare appear on his face as both women began to laugh again, the smile on his face growing as he realised how easy they'd gotten on.

XOXOXOXO

"Thank you for coming tonight Detective, it was nice seeing you properly" Alexis smiled as she stood by the stairs smiling at the brunette.

"Alexis, my names Kate, the only person who needs to call me anything slightly professional is your father" Kate explained as Alexis nodded and smiled. "Goodnight" she added, watching the redhead quickly sneak up the stairs and disappear from sight. Turning back around to look at the man who was next to her, she smiled before standing and holding her hand out for him. "Are you going to show me around or not?" she asked, surprised at how fast he got up. Leading her around the apartment, he pointed out the obvious things before leading her towards a door and opening it.

"This is my office, the place where all my genius writer ideas originate from" he laughed, shutting up and she pushed him in and shut the door. "And I think the first place in my apartment where I'm going to get lucky with a certain brunette" he added as she rolled her eyes and wrapped her arms around his neck. "God Kate, you are beautiful" he whispered as she moved closer to him and sighed.

"I'm going to have to go, your daughter is going to get suspicious if you spend another night with your mysterious woman" she giggled lightly before kissing him gently. "And by the way, you are amazing Rick" she added, a smile covering his face as he ran his hands down her back, his fingers moving into the waistband of her jeans. "God if you don't stop, I won't leave and I don't want your amazing daughter to find us in a compromising position which might freak her out" she whispered into his ear, her fingers slowly running up his chest, teasing him.

"Maybe I could come early tomorrow morning?" he suggested as she smiled. "Beckett called me in Alexis, I'm sorry" he whispered as she nodded and walked out of the room, grabbing her bag quickly before slipping her keys out. Taking off a spare, she slipped it into his hand before closing his fingers around it.

"Let yourself in" she announced before biting her lip and walking towards the door, loving the power she had over him as she slipped out of the apartment and finally allowed herself to giggle from amazement before she went into shock. Since when did she giggle? But also when had she become so desperate to be around one man in particular?