Question: What is the musical song called that's played during Otter and Mrs. Wormer's affair in Otter's bedroom?
Answer: It's Bossa Nova music that has no title. It was incidental music composed by Elmer Bernstein for the film.
Bishop73
It's the theme from A Summer place.
The theme from "A Summer Place" is playing when Mrs. Wormer comes into the house. But it's not what is playing when they get into the room.
Bishop73