Niles: It means she's going to be our mother. What are we going to do?
Frasier: Well, there's nothing we can do, Niles. It's what Dad wants.
Niles: But what do we even call her?
Frasier: Well, I suppose she'll want us to call her "mother." No, no, that's too formal. "Mama"... no, "Ma!"
Niles: Oh, better still. "Don't you look nice, Ma." "Yes, I'd love another corn dog, Ma." "Off to the roller derby, Ma?"