Disclaimer: I don't own any character except Sam. I made her and she's Mark and Addison's daughter.

A/N: 4 yrs after Addie left SGH. This is not true but I can dream, can't I? Enjoy!

Addison sighed. It's been four years since she last saw SGH. Four years since she left. Four years since she left Mark when she found out she had his child. And now, she was back for a consult for Derek, the new chief. She also brought along her 4 yr. old daughter Samantha Montgomery (Sloan) or Sam. She had Addison's red hair but a little browner. She had Mark's hard to miss smile, eyes and a bit of his attitude. She missed him.

Sam tugged on her mom's blouse. "You used to work here, mommy?"

"Yes, sweetie.", Addison replied.

Together they walked into the nearest open elevator. Mark was in it. Addison tried to keep cool, hoping he won't notice how much Sam looked like him. He looked the same but something about him was different. The flirty glint in his eye was lost. Ever since she disappeared, he had changed. He no longer had "regular activities".

They stared at each other in disbelief as Sam glanced at Mark curiously. It was very awkward.

Mark cleared his throat."Addie?" He couldn't believe his eyes!

"Yeah it's me. I came for a consult", she replied. Mark's eyes shifted from her to Sam. She looked like someone he knew but he couldn't place it…………………………..He checked Addie's fingers for a wedding ring. None.

"Um…..this is my daughter, Sam.", turning to her daughter, "Sam, this is Mark. Mommy used to work with him". And slept with him…

"Nice to meet you Sam." Mark said. "How old are you?"

"I'm 4 already", she declared proudly. Mark did some mental math. He and Addison slept together 4 yrs. ago, then she left. It couldn't be.

Turning to Addie he asked"So how long are you gonna be here?"He hoped for a week.

"Probably a week. We could catch up later, I'm free. 4:00?", She really did miss him.

"Uh…….it's great. Meet you here at 4:00 then", he confirmed. The elevator opened and rang.

"Bye Sam." He faked a salute, making her giggle. "See you later."

"He's nice mommy. I like him", Sam remarked after Mark left. . Addison smirked. It was so like Mark to gain the approval of strangers. She wondered whether he guessed that this was his daughter. She was amused that they got along well-without any effort at all.

They stepped out of the elevator and walked toward Derek's new office.

"Hey Addison", he greeted as they hugged. "You look great. Who's this", he asked, looking at Sam.

"She's my daughter, Sam. And no, I'm not married.", she added, noticing Derek's glance move toward her hand.

"Is she?" asked Derek.

"Yes"

"Mark knows?"

"No."

"You sure?"

"Yes."

"Ahh, okay."

"So about this woman who has quins….." Addison inquired. She wanted to change the subject before Sam gets suspicious. She can be very observatory and smart, like Mark.

"Right. Um she's 34, normal weight, 2 girls and 3 boys……….", described Derek. He still glanced at Sam occasionally. She looked so much like Mark.

So what d'ya think? Please R&R, k? I need help and ideas, I'm inexperienced. Thanks!