The house is Oakley Court, used for exteriors in several Hammer films, and for The Rocky Horror Picture Show (1975). It was later turned into a luxury hotel.
The screenplay is credited to Diana Daubeney, director José Ramón Larraz's wife. According to Larraz and producer Brian Smedley-Aston, she didn't actually write a word of it. She was credited because, as a British citizen, she filled a UK production quota.
Marianne Morris said in a 1994 interview that her 17 year old daughter was very embarrassed when her friends said they found a copy of the movie and watched her fully naked mom have lesbian sex. Morris thought it was funny.
Marianne Morris said in an interview with Mayfair magazine that she drank a bottle of Scotch to get ready for her lesbian love scene with Anulka Dziubinska. Then passed out right after they finished filming.
Anulka Dziubinska was Playboy's Miss May 1973 before making this film, and Marianne Morris appeared nude in the October 1976 edition of British Men's Magazine Mayfair not long after making this film.