Adultério Por Amor(1979)

The middle-class housewife Natália and her husband Guido Rossi have been married for three years unsuccessfully trying to have a baby. Their best friends are Flora and Guido's partner Jorge that have three children. Guido refuses to be submitted to clinical examination while Natália secretly submits and finds that she is healthy. Natália loves Guido but feels that their marriage is near to the end. When Natália travels to Poços de Caldas with Flora to rest for a couple of days, she meets the student Gustavo and decides to have one night stand with him to get pregnant and save her marriage. Seven months later, Gustavo finds Natália and blackmails her, forcing the future mother to take an ultimate decision.