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Derek walks further into the room. His eyes cast over the exam room and what he has interrupted. Immediately Meredith darts to the corner of the room as she attempts to catch her breath. Mark doesn't move he stands there facing Derek. Derek can feel his blood pressure rising as he clenches his fists by his side.

No one says anything. The door closes behind Derek. Meredith listens to the door click close. As if on cue Derek lunges toward Mark. Mark dodges him and pushes him into the sink.

"You fucking bastard," Derek spats as he jumps on Mark knocking him to the floor. His head bangs loudly as it crashes into the cold, hard tile.

Mark frees his right hand from Derek's face and bunches him squarely in his nose. Derek jumps to his feet and cups his now bleeding nose. At this point the door is pushed open and the two fighting men are attracting quite an audience. Addison Shepard walks through the crowd and walks into the exam room.

"Stop it," she screams. Mark and Derek continue to fight. "Stop it," she screams louder and she stomps the heel of her Prada pump on the ground. The two men stop and look up at her. Addison surveys the room and notices Meredith in the corner of the room, and Mark's belt and jacket on the floor.

Mark coolly collects him self as he moves to pick up his lab coat and belt. The crowd outside begins to disperse. Addison glares at all the occupants in the room. Derek glares at Meredith all together ignoring Addison. "How could I be stupid enough to fall in love with you." Sadly Derek turns away from her and walks out of the exam room with his hand covering his nose.

Meredith's entire heart crumbles as Derek leaves the room.

What have I done? There's no way he'll ever be able to look at me the same. Oh my God, what have I done?

"I cannot believe you," Addison snaps at Mark who is leaning against the exam room table. Addison turns and exits the room trying her hardest to remain composed and not cry until she was in the privacy of her own office.

Mark and Meredith stand there, neither of them is able to look at one another. Mark slides his belt through the loops on his pants. He fixes the collar on his jacket and heads toward the door. He stops, turns, and looks at Meredith. He gives her a sad nod and walks out of the room.

Meredith stands still in the corner of the now empty exam room. She slides her back down the wall and sits on the tile floor. She pulls her knees into her chest and drops her head. She begins to cry, not caring who is watching or what they are thinking.

gagagagagagagagagaga

Mark attempts to go about the rest of his day as if nothing happened. He tries, but ultimately isn't very successful. For the large part of his day he had sits in his darkened office only to come up when he is paged.

What have I done?

It's a quarter to twelve and Mark figures he will be able to sneak out of the hospital without running into anyone. He walks into the air-conditioned hall and down the hall to catch one more glance at the board. As he approaches the board, he sees Addison standing in front of it staring intently.

"You know I used to hate a full board. Back in New York a full board meant that I wouldn't get to see you or Derek. A full board ensured that my dinner reservations would go unused that night. And now as I stand here in front of this near empty board I'm absolutely petrified. It means that my husband is at home, and that I have to go home to him. You know what I don't get, why there aren't more prenatal emergencies in the middle of the night. I mean that would make things much easier. But I guess things don't always work out the way you want them to. Now I have to go home."

Addison pauses and chuckles to herself. "To the trailer... I have to craw into the bed we share and pretend that everything is okay. For the last few weeks I've been very good at pretending. I pretended that I didn't hear any of the rumors about you and Meredith, but now I have confirmation, and I don't think I'm going to be able to pretend anymore. I have to go home and pretend my heart hasn't been broken into a thousand pieces, and Derek in turn has to pretend the same." Addison's voice is cold and distant and she still is staring at the board. "Do you love her?"

That's a good question. I could respond with my initial reaction of no or I can't attempt to be more honest with her and myself.

"Addison, I don't know."

Addison takes a big breath in as she allows herself to look away from the surgical board. She takes a few steps backward. "I mean it serves us right. Derek and I hurt and reject the two of you so you find the other person who knows exactly what you're feeling and you give it a try with them. She won't hurt you. She won't leave you, and you won't leave her. It's perfect actually, and lets not fair to mention that it will utterly destroy your former lovers." Addison clasps her hands together and feigns excitement, "Now that's the best part."

"We, I never wanted to hurt you. Meredith was just here for me when you couldn't be."

"Well now Meredith always seems to be there for the men I love when I can't be... I could be there for you." Addison casts her eyes down to the white tile.

Mark's heart drops in his chest. "You could leave your husband."

"And fall into the same vicious cycle again. Leave something comfortable to run back to a man who has fallen in love with another woman. We could try to salvage our relationship but at the end of the day you will still be in love with someone else. Jesus Christ, I cannot believe that this is really happening—again."

Mark moves closer to her.

"No, you stay where you are. What is it about Meredith Grey? Is she a better lover than I am? Am I too prudish and refined and she's the dirty girl that fulfills all your secret needs and desires, or is it more than that? Is she a better listener? A better girlfriend? A better person?"

Addison drops her hands to her side and moves closer toward Mark. Her face is only a few inches from his. "I guess it doesn't matter," she whispers. "She has you." Addison kisses him softly on the lips and moves away from him. "I have to just accept it. I can't keep pretending anymore, I'm too tired."

Mark stands there dumfounded he can't find the right words to say.

"Good night, Addison."

"Good night, Mark."

gagagagagagagagagaga

Meredith cannot sleep. She looks at her clock. It's almost three in the morning. Thankfully she didn't have to go in until twelve tomorrow. She kicked the heavy blanket off her and onto the floor. The house was silent. George and Izzie were in their respective rooms.

I don't know who they are anymore. We just all happen to live in the same house…

Meredith hears a loud banging on her front door. She climbs out of her bed and runs to the door. She sees Mark standing there.

Should I even open the door? I mean I guess I have to, he can see me though the glass.

"What are you doing here?" Meredith hisses at him as she opens the door and steps outside onto the porch.

"I couldn't sleep." He states blankly.

"Me either."

"Meredith what are we doing?"

"Passing time and fucking ourselves over."

Mark moves closer and touches Meredith's face. "I don't think we are just passing time anymore."

Meredith say 'goodnight.' It's too late to try to figure this out.

"Mark you still love Addison."

"And you still love Derek."

"Exactly."

"No Meredith. Do you think either of them will ever be able to look at us the same?"

Meredith shakes her head no.

"I mean this started before we got caught. Thing have felt different for a while haven't they?"

Meredith meets his gaze and nods. Mark reaches out and cups her face again.

"So we have two options. Be alone or try to figure this out. Whatever you want to do I will respect. You just have to tell me which."

Meredith looks up at him with her eyes full of pain.