Meredith turned and kept walking down the hallway and Mark followed after her

Meredith turned and kept walking down the hallway and Mark followed her. She looked back and saw Mark following her. She turns around.

"Please go I can't deal with you right now…Please just go"

"Not until you tell me what's got you so upset"

"I… I can't"

"Why? Why can't you tell me what is wrong Meredith?"

"Because it will change our lives and ruin my life with Derek"

What could possibility do that? Come on its not like you are pregnant with my baby..."

"Actually I am"

"What? ... How is that possible?"

"Well let's see we slept together and now here I am pregnant."

When Meredith's words hit Mark's brain he stepped back and collapsed against the wall and let out a breath he did not know he was holding and put his face in his hands.

"You're serious? You're pregnant?"

"Yes Mark! I am"

"Mer… I'm so sorry I never meant for this to happen"

"Well we made a mistake and it did."

"What are you going to do?"

"I'm not sure yet it's barely sunk in."

"I know one thing. You have to tell Derek...This is seriously going to ruin our friendship."

"I know that and I'll never get to be happy with the love of my life. All because of one drunken mistake"

"I am not going to let you see it as a mistake though. We, all of us, Derek, Addie, Me and you are going to care for this baby and give it all the love we can give them."

At that moment, Meredith started crying and Mark could not stand seeing her in so much pain so he got up and pulled her into a hug just as Derek turned the corner to see them embrace. Derek slowly walked over to them.

"What the heck did I just walk in on?"

Mark released his hold on Meredith at the sound of his voice and lifted Meredith's chin so that they were eye level.

"I'm going to go so that you two can talk"

Meredith did not say a word she just slowly nodded. Mark turned and left and Meredith slowly turned and faced Derek.

"I think that we need to talk"

Derek did not say a word he just waited for her to speak. She thought it would be better to just came right out and say it.

"Derek I'm pregnant and Mark's the father"

Derek was stunned he really did not see that coming.

"Uh… wow"

"Derek I will understand if this is the end of us I really will"

"I can't believe this."

"When did you sleep with him we've been back together for eight months?

"Um... before we got back together or course."

"I want to know when Meredith"

"While you were dating that nurse Rose"

"You slept with him while I was dating Rose?"

"Yes look I know it was stupid and I was hurt I felt as if my perfect life was being taken away"

"Meredith that is bull. I know that you always had a thing for him."

"What… Derek no it was one drunken night we were both hurt by the people we love"

"I don't believe you."

"Well I'm sorry but it's the truth"

"So that's why you did it, seriously?"

"I wish I could take it back I really do but, I can't"

"You're right you can't"

"Please Derek; you can't be mad at something that was a mistake to begin with."

"Meredith you betrayed me and lied to me for months"

"I'm so sorry"

"I know you are but that doesn't changed that it happen and now you're pregnant with a baby that's not ours and that's what truly hurts me."

"You can still be apart of its life. It doesn't have to be ours for you to love it."

"Maybe in time but, not right now"

"What! You can't do that!"

Just then, Derek's pager sounded and he looked down as it flashed 911 to the pit. He was grateful to put a stop to this conversation for the moment.

"I got to go"

He turned a left without even saying I love you. Meredith looked at him rushing off and did not believe the events that just occurred... The weight of everything that had happen that day had finally caught up with her and she collapsed in a heap and began to sob.