Derek stopped outside the trailer still reeling from what Addison and what yelled at him earlier and what had happened later at the prom. She was mad, and had brought up everything that had happened in the last few months. But he couldn't blame her for being mad, he was mad at himself for the fact that she was right, and the fact that he had just slept with Meredith. Here she was trying to make things work, and he couldn't seem to make himself care, he had done exactly what she had, he was a cheater.

He knew that she had given up a lot by coming here and trying to make things work, why couldn't that be enough he wondered, as he opened the door to walk in.

She was sitting on their bed cross-legged flipping through an album when he saw her. She had already gotten out of her prom dress and was uncharacteristically casual in jeans and a t-shirt.

"Hey," Derek said. Addison didn't even look up. He knew that he had hurt her yet again tonight; she had seen the look passed between Meredith and him before Meredith had chosen to go with Finn. Addison his wife, the woman that he had made glow almost six hours earlier when he asked her to go to the prom was halfway down the hallway when she turned around to see if Derek was coming, unfortunately for her he was standing there looking at Meredith walking away with Finn.

It was about that time that Derek heard the door to the stairs slam against the wall and he ralized that Addison had seen him, and Meredith, and the look passed between the two. He wondered if she would even be home when he got there since they were on seperate cars.

Derek had even raced after her, but all he had seen was her black BMW speeding out of the parking lot.

"Addison," he said. This time she did look up at him, but with a look on her face that he had never seen before.

"What do you want Derek," she asked him coolly.

"We need to talk."

"Oh so you want to talk now, is that it? I tried to talk to you last night but you blew me off, only when I screamed at you in fornt of everybody did you finally hear me, and then all you did was turn and walk way. But your good at that aren't you,"she hollered.

"Addison wa….," he tried to say. But she cut him off.

"And then when I tried to talk to you later, you run and hide. Oh yeah, I knew what you were doing. But now your ready to talk, so we're finally going to get some stuff said. We're finishing this fight once and for all tonight Derek." Then Addison shut the photo album and sat it beside her on the bed.

"Do you know what I've been doing for the last hour Derek?" she asked.He shook his head no. "I've been looking through our old photos, looking at the happier times. I've went through about five, and looked at our Christmas's, Anniversary's, Vacation's and even our old wedding photos, trying to find that last time you looked at me, like you looked at her tonight, Derek. And you know what I realized, it's been a whole hell of a long time."

"Addison, I don't know what you want me to say."

"Nothing, I guess there's nothing you can say. I don't know why you didn't go on and sign the divorce papers when you had the chance. It's not like you really wanted to make things work anyway. It's like what you told Mark, I'm an obligation."

"Jesus Addison, can you make it through a conversation without throwing Mark's name into it," he asked, and then he wished he hadn't said that at all.

"Oh yes Derek, let's bring Mark into this and finally get this out of the way too. You seem to think that he was the casue of our problems, what you don't seem to remember is that you had left me long before I ever slept with Mark."

"I beg your pardon, but I wasn't the one who had an affair!" Derek shot back.

"In reality no you didn't, but you weren't there and you hadn't been in months. We did get busy Derek, and we didn't take time for each other, and you didn't take the time to remember important dates, like our last anniversary," she screamed. "And apparently I was nothing but an obligation then too, because if I wasn't maybe you'd have done a little more than walk out the door. Maybe you'd have hit Mark, or even slapped me, screamed, hollered, done something!" By this point tears were starting to stream down Addison's face.

"You don't think I cared! Damn it Addison, if I would have had a gun in my hand I would have probably used it," he screamed at her, but then Derek got quiet and said, " he was supposed to be my best friend, and you, you were my wife. We took vows, and they certainly didn't stop you that night now did they. But you know what, be glad I chose to walk out the door, because the hurt and rage that was flowing threw me at the moment, I would have probably hurt you both."

That seemed to quiet things down for a few moments, but then Addison spoke again, almost a whisper this time.

"Derek, what brought us to this point. We were so happy, we were the envy of all of our coworkers, the couple so in love."

Derek moved over to the bed and sat down beside her. He knew what brought them to where they were, but it still hurt to much to talk about.