Quote from Denise in the episode Spoiler: Filmed Before a Live Studio Audience
Denise: [sighs] Why do I even bother? Bert: Problem? Denise: Your BFF forgot my birthday. Bert: You do realize he's got a lot on his plate, what with the end of the universe and all? Denise: I already heard that from him. I don't need to hear that from you. Bert: Want me to talk to him? Denise: Absolutely not. Don't you say a word.
