I fell in love with this dark French comedy back in the early 90s. It's the story of an elderly woman who manages to kill her caregiver, and moves in with her nephew's family in Paris. The more people try to make her happy, the meaner she is to them.
Nephew: I don't think you'll be capable of keeping Tatie in July. You will come with me to Greece.
Niece: But what about Tatie?
Nephew: I'll make arrangements for her. I think I made a mistake taking her in. I want to tell you something, but you have to keep it a secret.
Niece: Of course.
Nephew: I think she's mean.
Niece: (gasps) You're right. She is mean.