Bella Donna (1983)

Lena is a cafe singer who specializes in songs Marlene Dietrich and Zarah Leander made famous. She is in love with two men; Fritz, a young saxophone player, uncouth, hypocritical and a slave of romantic myth; and Max, married to Lena but willing to do anything--including helping her enjoy her 'infidelities'--to keep her next to him.