A/N: Hey! Thanks for the awesome reviews. Maddison is my fave grey's anatomy couple so I wrote this fanfic about them. Enjoy!

"Hey Addison", called Derek. Addison was already exiting his office. "I forgot to tell you something! You have a surgery at um….1 p.m. And you can't bring Sam with you, sorry. You're gonna have to leave her somewhere."

Addison walked back into the room."What?!? Are you free at that time?"

"Um….no," he answered. "I think Mark is."

Addison thought fast; there wasn't anything wrong with leaving Sam with Mark. He could be irresponsible at times, sure, but she just felt like it wasn't like that anymore. Besides, it would only be for a couple of hours…..

"Mommy," said Sam."I wanna stay with Uncle Mark while you're working. He's fun! Too much, thought Addison. "Please mommy! I promise I'll TRY to behave," she added. She put emphasis on the word try so that if she didn't, she wouldn't be scolded at for lying.

Addison laughed at what Sam just said. So much like Mark. "Okay. Just don't give Uncle Mark a hard time, promise?"

"I'll try!" she replied, giggling. She was excited already. "Let's eat, I'm hungry!"

"Fine. What do you want?"

"A sandwich with pickles, chicken, spaghetti, some juice…….."

After Lunch:

Knock, knock, knock, knock. Mark stood up to answer the door. There was Sam and Addison.

"Addison?"

"I um need to leave Sam because I have surgery. I can't just leave-"

"No problem," Mark replied. He smiled his trademark smile which made her smile too. He kinda liked Sam and he'd do anything for Addison. Looking down at Sam he said, "So, what do you wanna do today?"

"Play!" exclaimed Sam. There really wasn't anything on the kid's mind. Addison smiled apologetically at him.

"Uhh… that's great," Mark said. "Come on in. Addie, see you later." Sam hopped into Mark's modern and clean-looking office. There was only one thing that looked out of place, a big stufftoy. A big, cute, bear.

"Your mom gave that to me years ago- she thought it was funny," explained Mark, seeing Sam's curious look. "You could play with it, if you like.

Sam nodded and Mark reached up to grab the stufftoy. He handed it over to the little girl who hugged it the moment her fingers got hold of it. Mark couldn't hold back a smile; he was reminded of Addison. What he did suppress was the urge to ask her who her dad was.

"Right. I have to go back to my work, just play with it, alright?"

"You gotcha, Uncle Mark," Sam assured him. He went back behind his desk to do some paperwork while Sam played with the stufftoy. Every now and then, Mark would look up from his work and look at Sam. He couldn't figure out why he thought she looked like someone he knew…..

"Uncle Mark? Would you play with me?" she asked all of a sudden.

"Um… yeah, sure." He got up and sat on the floor with her."What do I have to do?"

"I'm the princess, Sunny-"

"Who's Sunny?" asked Mark.

"Oh, I named her-" she pointed to Mark's bear, "-sunny. We need to buy toys in the next kingdom and we need a horsey-that's you!"

Mark chuckled and went down on all fours. Sam climbed his back, clutching Sunny with her right hand. Once she was there, Mark pretended to be a wild horse to make her laugh.

"Kiddiya, horsey!!! Whoah!!!"

"No way! Which way leads to the Toy kingdom, princess?" he said, smiling more than he had in a long time. He was beginning to feel so comfortable with her.

"That way-!" she pointed. Mark crawled toward the direction of her tiny, cute fingers. Since they were facing the other way, they didn't see that Addison had appeared in the doorway already. She was half-smiling, half-laughing.

"What are you two doing?" she asked. Mark turned around and Sam got off his back. Sam ran to hug her mom.

"Um…we were just playing. It was Sam's idea," he tried to explain rather sheepishly.

"Uh-huh" answered Addie with a smirk. "C'mon, let's go have a snack".

Turning to Sam, she said, " I thought you said you'd behave?"

"No, I said I'd TRY, mommy," she relplied slyly.

"She DID try, you know," chipped in Mark. " I guess." Addie laughed.

"C'mon you two, let's eat already"

Like it? I hope you did, please R&R, k? I promise to update as soon as I can.