A/N- Hey thanks for the great reviews. I hope that you will enjoy this chapter as much.

-Seattle Grace- Derek's POV-

I smile as I watch Addison playing with Georgie in her room. They are sitting on the bed with Georgie in between Addison's legs playing with Barbies. I sigh thinking about how if I had stayed with Addi, that that little girl might have been mine. Unfortunantly we can't change the past. I wish I could, but I can't. I look intently at the face of the small child. It is so perfect, so detailed. Her freckles appeared as if they had been placed with pricision, and her demples were exactly the same spot on each cheek. Her big green eyes could not belong to anyone but Addison. As I watch her I don't notice Addison get up and come to stand beside me.

"She's beautiful isn't she?" she whispers.

I nod. "That she is." I turn to look at Addison, and watch her focus intently on the girl of our observations. "We are going to begin to run tests tomorrow." I say solomnly. "I guess you are going to stay here with her?" I knew the answer to my question, but asked anyway.

Addison nods slowly. "She needs me Derek, and I need her. Georgie is all I have." She quickly wipes away a tear that escaped from her eyes.

"Addison I know we are not on the best of terms, but I am here for you. I always will be." I say with passion. She simply nods accepting the offer, but not paying it much attention.

Georgie sticks her head out of her hospital room and peeks around the corner to see us. I give her a big smile and motion for her to come to me. She runs giddly and jumps into my open arms. "Unca Derek will you read to me?"

Before I can answer Addison butts in. "Honey, Uncle Derek is busy, but maybe later he can stop by."

Georgie gives me a pitiful look that I can not refuse. Man how does Addison do it? "Actually I am on a break, so I can read for a little while. Maybe your mommy could get a nap or something." I say talking to Addison more than Georgie.

"Yay!" She yells happily. "Mommy he can stay!"

"I heard that. Derek you really don't have to stay. If you are too busy I understand, and I am not that tired." She says taking Georgie from my arms.

"Addison you look exhausted. You should lie down for a little while, and then you will feel better, I promise." I take Georgie back from Addison and walk into her room leaving Addison in the hall. She just stands there looking confused. I walk back out to her and hand her a small key. "Here this is to the doctor's lounge. There are some beds in there you can sleep on one of those." With that I turn around to go back to Georgie. Addison watches for a moment, and then wearily wanders off to find somewhere to collapse.

- Gorgie's room-

Gorgie squats down and rummages through her big Dora the Explorer bag and finally pulls out a rather large book. She runs over to Derek and hands it to him. He lays it on the bed then picked her up and sat her beside him. He picked up the book and slowly opened it. It appeared to be Georgie's baby book. Georgie began to tell him what every picture was. "That is me! Inside my mommy's tummy." She grinned as she pointed to a picture of a very preagnant Addison. He had always imagined what she would have looked like pregnant, but seeing it was different. She looked happy, truly happy. As they continued to look there were many pictures of Georgie as a baby and toddler. As he turned the last page a large picture fell onto his lap. Georgie grabbed it and showed him. "This is a picture of you and mommy! It is the only one I have seen. Mommy doesn't let me look at her books." She said sadly. "This is how I knew what you looked like. Mommy said that I could call you Unca Derek, but you aren't my unca are you?"

He slowly shook his head."No, I'm not." He lovingly caressed the picture. It was one of their wedding photos that they had taken. They had worn casual clothes for some of their pictures, and this was one of them. Derek was lying on the grass propped up on one elbo, and Addison was lying in front of him. She was looking up at him and he was gazing down at her. They had been so happy then. He thought that they would always be, but things had turned out differently.

"Unca Derek do you love my mommy?"

He quickly looked at the young child. "Why do you ask?"

"What did she ask?" Addison said as she walked into the room.

Derek looked up startled. "I thought you were taking a nap."

"I slept for two hours. Did you two have so much fun that you lost track of time?" She went over and kissed Georgie's forehead.

"I was showing Unca Derek my book." she said proudly.

Addison looked at him with surprise. "I'm sorry you had to look at that. She carries it everywhere, I don't know why. Here let's put this up." Before she noticed Derek slipped the photo behind him. "Okay missy it is time for your nap."

"But mommy I not sleepy." she whinned while yawning.

"Well, if you want to be a good patient then you should listen to your mommy. She is a doctor you know." Derek said coming to Addison's aid.

Georgie sighed."Fine." She laid down in her bed and snuggled next to her stuffed animal. "Night Unca Derek. Will come visit tonight?"

"I'll do my best."

-Georgie's room-11:00 pm-

Derek slowly walked into Georgie's room shut the door quietly. He smiled as he looked at the little girl asleep in her mother's arms. Gigi's little socked feet stuck out from underneath her blanket anlong with her mom's. As he approached his eyes strayed from the brunette to the red head lying beside her. He gently brushed away a stray piece of hair from Addison's face. As he looked at her his heart jumped when her eyes fluttered open. "Hey." She whispered softly.

"Hey."

"She staid awake as long as she could, but I'm afraid that you lost her about two hours ago." Addison slowly slipped out of the bed and covered up Georgie.

"I figured as much. I would have been by earlier, but I had an emergency surgery to do." He watched as Addison put on her coat and shoes. "Where are you going?"

"To the roof. I need some fresh air, I need to get out of here." She slowly walked past him. He stood silent watching her leave. Just as she was about to walk out the door she turned back to face. "You can come if you want. I wouldn't mind the company."

He smiled."Let me get my coat."

As they opened the door to the roof the chill of the night air hit their faces. Addison inhaled deeply. She walked over to the edge and stood next to it. As she looked up into the night sky she couldn't help but wish that Derek would wrap his arms around her and promise her that everything would be okay, but she knew he would do no such thing. What she did not know was that he was wanting to do the exact same thing, but was afraid that she would get angry. She turned around to face him. "So I might as well ask you now. Where is Meredith?" The question hurt, but she was dying to know.

He sighed. "We broke up. She fell in love with another man. I guess I saw it coming. We weren't happy any more."

Before Addison could stop herself she said what she had been longing to say for a long time. "Well it's not like we didn't see it coming. I mean you could really tell she was the type to stick with one man."

Derek was now too caught up to watch what he said. He looked into her eyes and glared evily. "Oh just like that guy who knocked you up, and then left you to raise a child on your own." The minute he finished Addison raised her right hand and slaped him across the face, hard. He held his hand over his cheek and stared at her. She looked at him with tears in her eyes, and then quickly walked away. He knew that what he had said was out of line, but so is what she said. He turned and walked away, decieding that it was time to go home.

As he walked to his car he saw a slim figure leaning against it. As he approached the figure came into focus. It was Addison. She walked close to him and stood, blocking his way to his car. She sighed and looked down at her feet. "I'm sorry, for what I said, and for slapping you." She looked into his eyes and let out a jagged breath. "It's just that Georgie's father, I...I loved him. He was all I ever needed." Derek didn't know if he could hear this, but he knew that he had to listen. "He left me for another woman. He never knew about Georgie, I didn't tell him because I didn't want him to feel tied down by her and later on resent her. Derek I know her father loves her, but I am scared to tell him. What should I do?"

"Addison any man deserves the right to know he is a father. You should tell him how you feel."

She slowly nodded as she walked closer to him. They were only inches away, and both of their hearts were racing. "Derek." she paused and breathed deeply. "You ...you have a daughter, and she is lying in that hospital."

He stood in shock. "What?" he stammered.

"I'm sorry, I...I..I can't do this." She cried and ran back into the hospital.

Derek stood frozen in that one spot. He had a daughter, a daughter by Addison. He was a father. All of these things ran through his head that night. He had many questions, but they would have to wait.

A/N- Well now you know who the father is. I hope you liked it.!