How, When, and with Whom (1969)

Paola, wife of a wealthy Turinese industrialist, meets Alberto, a friend of her husband, who emigrated to Argentina and has returned for business reasons. After a few days, Alberto confesses his love to Paola, but she resists. However, during a vacation in Sardinia, having waited in vain for the arrival of her husband, she gives in to Alberto's wishes.