In response to a review, yep it is defiantly a merder, I don't like addek either. I didn't want to give it away but if it means more readers, oh well, I'll live.

Okay well this is it, the start of my first GA story, I hope you like it and I hope it's something just a little different than most stories out there. Oh ya, and sadly I don't own Grey's Anatomy.

How it Started

Derek Shepherd walked up the steps to his house in New York with his 11 year old daughter Christy. He had finished a successful surgery, picked up his daughter at the baby sitters and was happily going home to his wife, to have dinner with her and Christy. That all changed when he walked in the door.

He knew something wasn't right, he could feel it, so he told Christy to go in the kitchen and pick something for dinner and he began to walk up the stairs. He could hear noises coming from his room and he knew what he was going to see when he entered but he was not prepared for whom. He walked into the room and immediately turned around, wishing he had stayed at the hospital later. He went back downstairs into the kitchen and tried to act normal for Christy.

"How bout this, hamburger helper."

"Sure sweetie that sounds great," he replied absentmindedly.

Christy knew there was something wrong; her mom hadn't come down to say hi to her and her dad seemed upset.

"Daddy, are you alright?"

That's when they heard the front door open and Christy spotted her uncle Mark leaving the house and wondered if he had anything to do with the feeling in her house. Mark left and Derek never answered Christy, just went upstairs to his room.

"Derek, you can't do this, we have to talk about this, you have to give me a chance to explain." Addison exclaimed as Derek took her clothes out of the closet and exited the room.

"No."

"It was one time Derek, I know that's what people say, I know that's what always gets said. It's just I don't even know how it happened, I don't know what I was thinking, he was just here."

"You screw my best friend and all you can say is he was just here."

Christy watched from the kitchen with tears in her eyes as her parents fought. Her suspicions had been confirmed, it did have to do with Uncle Mark, mom slept with him. She continued to watch as her dad threw her Addison's clothes out the door into the rain and told her to get out.

"Get out."

"No, no I'm not going we are going to..."

"Get out of my house now!" He yelled, then he dragged her out the door and slammed it shut.

Christy didn't know what to think or do; she had never seen her parents like this, especially her dad. She watched as her dad stood there for a minute, he looked really hurt and it scared her. Then he let her mother back in and they hugged as she apologized, but Christy could tell it was not a normal hug, this had hurt her dad for good. She tried to kiss him but he pushed her away.

"I'll go, you stay, I'll come back for my things in the morning."

"No, stay, we can survive this, we're Derek and Addison."

"I can't look at you, I look at you and I feel nauseous." He breathed in and out quick, at a loss for words, hurt evident. He looks like he's going to cry, Christy thought. "We're not Derek and Addison anymore." With that he left and Christy ran up to her room not knowing when she would see him again, not knowing if her family would ever be the same again. Just not knowing.

Okay well there's the first chapter. It's basically what happened in Addison's flashback in the Season 3 premiere accept I added Christy. The next chapter is where it really starts. Please review!