Grey's Anatomy Season 6 Episode 11

Meredith: What's the deal with you and Reed?
Alex: Nothing.
Meredith: You're not trading her surgery for sex, are you?
Alex: Give me a break.
Meredith: Because if you are, it's gross.
Alex: Look, if I do it's 'cause I want to. You gonna look me in the eye and tell me Derek never threw a craniotomy your way after the two of you spent an hour in the on-call room? Please.
Meredith: I know it may not feel like it, but you are still married. And Izzie...
Alex: You know what? I'm done worrying about Izzie. And she sure as hell ain't worried about me.
Meredith: This is the old Alex. Sleeping with some random person because you're angry and hurt.
Alex: That's what you always did.
Meredith: And then we grew up and got married.
Alex: Yeah, well, it turns out your stupid post-it is ten times the marriage my church wedding ever got me. I'm movin' on.