Mark, Callie and others in “Don't Deceive Me (Please Don't Go)”

Mark

What did Arizona say?

Callie

Well, she said she's in.

Mark

Well, that's good, right?

Callie

Eh, I'm still hedging my bets. I'm not gonna move back in with her until I know for sure she's not gonnna bail again.

Lexie

[walks up] Hey, you got dinner plans tonight?

Mark

No.

Lexie

I'm cooking for you tonight, your place. I rocked the lab coli. [kisses him and walks off]

Callie

So when you gonna tell her?

Mark

Not until after my home cooked meal.

Callie

Mark, you do not have to do this. I'm giving you a get out of jail free card, no hard feelings, you can be the cool uncle that hangs out on Sundays.

Mark

I'm not the cool uncle. I'm the dad.

Callie

You love Lexie. And the last time a Sloan kid appeared in Seattle she dumped you. Now, if you were the cool uncle...

Mark

I'm not the cool uncle! Don't ever say that again. This is my kid. I want this kid. [mutters] Cool uncle.

Callie

Well, so then tell her. Do not wait until this kid comes out looking all Sloan-y.