This story is completely AU. So everything you already know about these characters and this show is wrong. I'm basically borrowing these characters for my own version of their love story.

Is a disclaimer necessary? If I were Milmar you all would get every Caskett wish you ever wanted! :)

SMUT WARNING! Oh, and don't hate me.

As Kate entered her apartment she immediately felt something was off. She pulled her phone out and had 911 typed in before she went any further. She placed her purse on the ground next to the door and her eyes began to search the room. Things had been moved, she could tell. Her apartment was always kept in order and with Josh gone things had stayed that way. She checked the kitchen and living room first, and nothing was missing. As she approached her bedroom she heard something. She stuck her head around the door frame, and there Josh was… spread across her still made bed, fully dressed with his face slammed into a pillow. She flew towards him in a fit of rage. Slamming both of her hands into his back, grabbing his shirt and jerking him over onto his back.

"What the fuck are you doing in my house, in my bed, are you crazy?"

He was startled, and his eyes were bloodshot and in shock. He was scared, and she was angry. His arms immediately hit the bed and he threw himself into an upright position.

"What the fuck, Kate? What are you doing here?"

"DOING HERE? What do you mean what are you doing here? It's my apartment Josh! What are YOU doing here?" She yelled, poking him in the chest and throwing the death stare straight at him.

Josh's eyes began to wonder around the room, taking in his surroundings. He started to panic and shake his head as if to wake himself from a bad dream.

"I was drunk, i…I…. I guess I accidentally came here. I don't know.. Everything is really really foggy right now."

Kate stood up off the bed and pointed out the door.

"OUT! GET OUT, RIGHT NOW, BEFORE I…"

"Before you what? Pounce me to death, or poke me to death." He started to laugh.

"Are you laughing at me… Are you seriously …. laughing at me?"

"I'm sorry Kate, it was an accident, and it's kind of funny when you think about it. Calm down, I meant no harm."

She was still fuming. How dare he break into her apartment when she wasn't here. How dare he treat her apartment like his own.

"I want my key back now, please." She stuck out her hand, extending it right into his personal space.

"Fine… It's probably for the best anyway. Not like I need it, and I don't want THIS to happen again, that's for sure." Now he was mocking her with his laughter.

He stood up and started searching the room for his jacket. He located it on the floor by the bathroom door, took the key out of the pocket and handed it to her. When the key hit her hand her stomach dropped. She suddenly felt an extreme amount of anxiety take over her body.

"That's it?" She said. Hand still open, palm up with the key sitting there.

"Excuse me?" He said. Turning back around to face her.

Kate didn't know how to respond. She didn't even really know what she meant by it. She didn't know why all of a sudden she felt like everything was wrong. How could she be feeling this way after just leaving Castles house. She had felt invincible before walking into this apartment.

"You just… show up at my apartment in the middle of the night. When I'm not here, and pass out in my bed, and I come home to you in my bed, and you act like it's nothing. Now you're mocking me, laughing at me because I'm acting like a crazy person. I don't care.. I don't care what you say, you owe me a real explanation. Why are you here, in my apartment." She was shouting now, and her blood pressure was on the rise.

Josh's hand went up in front of him, motioning for her to calm down. "Kate, look, I'm sorry, I should have never came here, but I was drunk, and I miss you, and give me something here, I'm dying without you. Are you really that shocked, I mean you must have seen the messages I sent last night? I couldn't stop thinking about you and how much I miss you. I've tried so hard to give you the space you need. I guess, I guess I just got too drunk and ended up here, and I am so sorry. It won't happen again, you have your key. I wont be barging into your apartment when you aren't here anymore." He said. And then he had a moment of realization. Where had she been?

"Why weren't you here? Did you stay with your parents, Lanie?" his breathing started to quicken, he had just realized that something else might be going on.

Kate started to walk past him into the kitchen to avoid his question, but he just followed her. She went straight for the fridge to grab a bottle of water and when she turned around he was still there. He was in her face and she could see the hurt, he was so hurt, but there was anger there too, so much anger.

"Kate, where were you last night?" he said calmly but he was adamant about her responding.

She ducked away from him, creating more space between them as she walked to the other end of the counter. She knew she had to give him something but she as unsure how to answer. Should she be honest and tell him that she was seeing someone else. Would he think that it had been going on for a while and that she had cheated? Maybe she should just tell him she was at her parents. She didn't want him to assume things that weren't true.

"It's none of your business." She said calmly. "We aren't together Josh, I don't have to tell you anything."

"Kate, It's been a week, If you're seeing someone already it means one of two things. Either you were seeing him before we broke up or you just met him and are already whoring yourself out to him. I'm comfortable with neither of those things."

"Whoring myself out, really Josh. I think you're just acting like a jealous jackass!" She yelled at him.

"So you're saying there is something I should be jealous about?" He was getting closer to her, crowding her into the counter.

"No.." She whispered, as he got closer to her body, to her face.

And then his mouth was on hers, and she was not resisting, she was deepening the kiss. Shoving her hips into his, creating contact that they both wanted. Their hands started to roam feverishly, tearing at each other's clothes. Josh's hands went straight to her pants and he unbuttoned them and began to pull them over her hips and down her legs. He pulled them down and over her ankles, tossing them to the side. He slowly placed sweet kisses up her legs on his way back up her body and when he hit her pelvic bone his hands began to roam up her sides. He stood before her, pulling her shirt up over her head. Taking her face in his hand and gave her one slow, sweet kiss.

"Lets take this to the bedroom." He said as he grabbed her hand, pulling her behind him to the bedroom. As soon as they crossed the treshhold her hands were on him. She started on the buttons of his shirt, and when she flicked the final button off she pushed the shirt down his shoulders onto the floor. He had already unbuttoned his pants and had them off before she had a chance to get to them. As they both stood there in their underwear, silently, eyeing each other, all Kate could think about were all the amazing nights they had enjoyed, just like this. All the love they had made, all the times he had come over mad at someone else and taken it all out on her in the bedroom.

"I miss you," She said. Her eyes started to fog up and she had to blink a few times to let the tears drop down.

He took her arms and shoved her onto the bed, climbing over her body and attacking her mouth. His hands began to roam down over her breast, over the soft skin of her stomach and when he reached her panties he shoved a finger into the side of them pulling them over her hips and down her legs, lifting each leg to pull the lace panties from her body.

He then took hold of both of her legs pulling her to the edge of the bed where he stood. Pulling her legs around his hips she wrapped them around his body tightly as he leaned over her, kissing her slowly.

"You good, love?" he whispered as he broke away from their kiss.

"Yeah, I'm good." She smiled and lifted her head to kiss him again.

He began to arrange himself at her entrance, feeling exactly how much she wanted him. He slid into her and began to thrust, hard, and fast. He took both of her hands in his and lifted them above her head, pulling them together and held them there with one hand. He then took his other hand and placed it on her hip to help her body slam into his repetitively. He was getting aggressive and she didn't know if she liked it or if it was scaring her. He slammed into her hard one time and she yelped in pain, and then he did it again. She tried to pull her hands from his grip on instinct and he let go of them, releasing his hold.

"Josh, you're hurting me."

Without saying anything he slowed his pace and leaned in to kiss her chest, up her neck, and then kissed her lips hard.

"Baby, I just want you. So much." He said as he panted through his slow thrust.

She could feel that he was on the edge of orgasm and she knew she was nowhere near close. Any pleasure that she had been feeling was ruined by his unwanted aggression. She started to sit up a bit and pulled him up onto her, flipping him onto the bed on his back. She then started to rise and fall quickly, forcing her clit to come into contact with his body, rubbing back and forth. When she felt her orgasm coming she quickened her pace. Placing both of her hands on his chest as she rose and fell above him. He came first and as soon as he released inside her she felt her orgasm hit. She rode it out until both of their hearts beats slowed and then she collapsed on his chest.

Josh placed his hands on her ass and lifted her enough to pull out of her and then sat her back down on top of him.

"I think I should go…" he whispered into the top of her head, placing a single soft kiss to her temple before lifting her off of him and on to the bed. He stood from the bed and started to get dressed. Kate just laid there watching him, holding back her tears so that he wouldn't see her cry. She was completely confused about what had just happened and why. This morning she had wanted Castle and only Castle, and now she was laying naked on her bed having just had what most would consider hate sex with her ex boyfriend.

Josh walked out of the room without saying anything to her at all. And when Kate heard the front door click shut she curled in a ball and cried herself to sleep.

Please, please don't hate me… I promise everything will be okay in the end.

Just remember, she is a 19-year-old girl who just got shut down by someone that she wanted. So what if she needed to feel something from someone, even if it was her ex boyfriend that everyone in the fandom hates. Now you really hate him, right?

Caskett will prevail.

If I don't get a shit ton of reviews on this I think I might give up on life. Even if they are hate reviews.