[Richie tells his father Royal he's in love with Margot, his adopted sister]
Royal: Margot Tenenbaum?
Richie: Yeah.
Royal: Well, since when?
Richie: Since always.
Royal: Does she know?
Richie: Uh-huh.
Royal: Well, what does she feel about that?
Richie: I think she feels confused.
Royal: Well, I can understand that, it's probably illegal!
Richie: I don't think so, we're not related by blood.
Royal: That's true. It's still frowned upon. But then, what isn't these days, right?