Wham Line: While playing Truth or Dare, Violet asks Stuart if he's ever slept with a woman. Freddie reacts with great hilarity, figuring the swishy Stuart would never had tried such a thing. Turns out Stuart has, and then:
Freddie: I don't believe you!
Stuart: It's true.
Freddie: You're lying!
Penelope: No, he isn't. (cue jaws dropping around the room)