German sound. Part of a longer film called Politess Bessessen.
A schoolgirl (Kathy) is picked up by her mother (?) (NK0420) in a taxi. She is taken to what seems to be a fetish club cum male brothel. The mother is made to demonstrate fellatio and fucking with one of the males while the daughter watches. The daughter then also has sex and the male pisses in her mouth. Another couple arrive, the female with shortish straight blonde hair (Sonia Svenberger).