A movie I saw in the 80s on cable tv. A girl with siblings lives with their mother who is slowly going insane. In one scene the girl is talking to an African-American woman, the mother of her friend, I think:
“Mother is going crazy”
“My daughter is probably saying the same thing about me”
“No, she’s really going insane. she thinks there are people hiding in our house”
The movie ends with the mother losing her mind and getting hysterical. The daughter moves to a city and is quite happy.
There’s a recurring theme song sung by a woman:
This time, we’re gonna make it
this time we’ll be a happy family