Mark: You look sad.
Meredith: I just saw my father for the first time in 20 years.
Mark: How'd that go?
Meredith: Could've gone better? (pauses) What're you still doing here?
Mark: I'm hoping Addison shows up.
Meredith: Are you still in love with her?!
Mark: You're still in love with him!
Meredith: She won't show, you know.
Meredith: He's not the kind of guy you leave if you can help it.
Mark: What if you're wrong? What if just this once ... life comes down on the side of the dirty mistresses?