Quote from Phoebe in The One with the Proposal (Part 2)
Joey: Hey, Phoebe! We're both backups? Ross: Phoebe, how could you do this to me? Phoebe: Look, I don't know what you are complaining about now? You were both aware of the situation. Ross: I was not. Joey: No, we weren't. Phoebe: Okay, this kind of back talk is not gonna fly when we're married.