Marge: Do you think you could be nice enough to your sister, Bart?
Bart: Oh yeah, easy.
Marge: You do love her don't you?
Bart: [whining] Oh Mom...
Marge: Well you do, don't you?
Bart: [uncomfortably] Don't make me say it. You know the answer, I
know the answer, he knows the answer, let's just drop it, ok?
Marge: Okay, Bart, you don't have to say it, but you do have to have a
loving attitude. Be nice to your sister.
Bart: [reluctantly] Okey dokey.
-- "Moaning Lisa"