Zoey looked up as she heard the door open, expecting it to be Derek to check up on her, so imagine her utter shock to see the plastic surgeon staring right back at her. "Zoey we need to talk."

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Zoey didn't know how to react. Part of her was curious and wanted to talk to him as she had so much to say but then the other part wanted to shout at him and wanted him to get out. She figured she'd let him talk and see what he was going to say. She could always throw him out if need be. Zoey gave him a look that said told him to start and Mark wanted to, he just didn't know how to start and what with. He decided to just be honest. "I've got a lot to say Zoey so just don't say anything for the moment. Just let me have my say and then you can say whatever you want. Just let me finish." He waited for her to say something but she remained silent so he continued. "I owe you an apology Zoey. I behaved like a complete asshole that day when I left you in the restaurant. A day has not gone past when I haven't thought about it, about you. I just want you to know that I wasn't upset because of your age, more because you lied to me. I stood there and watch you bawl your eyes out and no matter how much I wanted to comfort you, my stupid pathetic pride stopped me from going back inside. It broke my heart to see you like that Zoey and I haven't forgiven myself for allowing that to happen."

"Asshole? I think prick would be a better word." Zoey spat out.

"I'll admit that yes but please just let me finish."

Zoey remained silent so he could continue. She thought about what he had said and couldn't really believe it. Was he really apologising for something he did five years ago?

Mark continued when he was sure she wasn't going to say anything more. "I'm not usually one for spilling my feelings but I haven't found another girl who's as amazing as you were – are – in five years. Everything I told you all those years ago … I've never been that sincere with anyone, let alone feel that way. What I didn't tell you is that from the moment you stepped out the bar the night we met and the moonlight hit you I was smitten. I had never seen anyone look as stunning as you did that night." As much as Zoey had wanted to stay pissed she couldn't help but smile. No' one had said anything as truly wonderful as Mark had in the space of five minutes. "Basically what I want to say, Zo, is that I am truly, truly sorry for the way I behaved and I wish I could take it all back. The truth is, I was in love with you, and I can't believe I just said that." he smiled.

Zoey let out a sarcastic laugh at the last sentence. Everything he said was going good until he said that last sentence. "Ha! I don't think so!"

"What? Don't you believe me?" Mark asked her, a little taken back.

Zoey shook her head. "No, I don't believe you. How could you have been in love with me? It didn't take you very long to move on to someone else. You walked away from me and then a couple of weeks later, you moved on to someone else and not just anyone else, Derek's wife. How can you stand there and say you were in love with me?"

That knocked Mark back. "What? How did you know about that? How did you know he was married?"

"He told me Mark. I went round to his because he wanted to talk to me and he told me everything. I was shocked that he was married but instead of running away -" she said putting emphasis on the last two words, "-I stayed with him and talked to him about it. Yes I was shocked he was married but imagine how shocked I was to find out about you."

Zoey walked in to Derek's house and found him sitting on his own with red eyes, he had clearly been crying. It had been three weeks after Mark had left her in the restaurant and Derek had called her up wanting to chat so she went straight over to his.

"Hey Der, hey what's happened? Are you okay?" She asked the second she saw his eyes.

"She's gone Zoey." Derek sniffed.

"Who's gone?" She asked him confused.

"Addison. My wife Addison."

"Why has she gone? Wait, you have a wife?" Zoey added surprised at this revelation.

Derek nodded. "Eleven years we've been married and she threw it all away."

"Aw Der. How did she throw it away?" Zoey sympathized.

Derek looked at her. "I can't tell you. It's going to devastate you Zo."

Zoey looked confused. "What's it got to do with me?" Derek stayed silent. "Derek, what's it got to do with me? Why will I be devastated?" she repeated.

"Mark." He said with such distain in his voice.

Zoey's heart dropped to the bottom of her stomach when he said his name and she didn't like the sound of his voice in which he used when saying it. "What's he got to do with anything?" she asked with almost a sense of anger in her voice.

Derek looked at her. He really didn't want to be the one to tell her but he had already said too much and he knew that Zoey wouldn't drop it until he told her. He sighed before saying, "He slept with her Zo, my best friend slept with my wife."

Zoey felt like her world had been turned upside down. The man she was in love with had not only destroyed her life but his best friend's. She felt sick to the bottom of her stomach. All she wanted to do was find that bastard and smash his pretty face in.

Zoey looked away from Mark. She had never met Addison but she hated them both for what she had done to Derek. Mark was, for the first time, utterly ashamed for what he had done. He was more ashamed hearing it from Zoey than he had done when Derek had told him to stay away and that they were to never see him again. When he first kissed Addison and when she started to lead him upstairs, it never even crossed his mind that what he was about to do was going to hurt the two people he cared for most.

"I can explain." Mark started.

"Explain what, Mark? Explain why you were so inconsiderate to Derek, never mind me. You made it perfectly clear you wanted nothing more to do with me but Derek? What did he ever do to you to deserve that sort of betrayal?"

"It was a rebound thing, Zoey. We were talking and drinking – a lot. I was upset and she said I needed someone to get over you and she was just there. It just happened. She was telling me how her marriage was falling apart and we both needed the comfort."

"Comfort, Mark, in the English language, is a few nice words and perhaps a cuddle or a kiss on the head or something of the like. What the two of you did was a whole different level. It was something entirely different and the fact that you were so able to do so after you were so "heartbroken" about leaving me the way you did tells me everything. The truth is, you're nothing but a womaniser who thinks with his dick rather than his brain. You're a man-whore who will stick it anywhere regardless of who he might hurt."

Mark stared at her and said nothing. He felt like he had been punched in the stomach. He hated how she had summed him up because he wasn't like that anymore and he wanted nothing but to prove that to her. He just wanted to make things right but clearly she didn't want to know. Without saying another word he turned around and walked out. As he did so, he heard Christina Yang's voice from behind him say, "Wow, she totally put you in your place."
He turned round and scowled at her. "Haven't you got interns to harass?" he said before storming off.