Lady on the Bus (A Dama do Lotação) (1978)

After being raised together since they were children, Solange (Sonia Braga) and Carlos (Nuno Leal Maia) get married in a traditional wedding. In the wedding night, the virgin Solange refuses to make love and is raped by her husband. Trying to prove to herself that she is not frigid, every day Solange gets a bus and has sex with strangers, with Carlos's best friend, with her father-in-law, but not with her beloved husband.