The Tiger and the Pussycat

Il Tigre internationally released as The Tiger and the Pussycat is a 1967 Italian comedy film directed by Dino Risi. For his performance Vittorio Gassman won the David di Donatello for best actor the film also won the David di Donatello for best producer.

Francesco decides to confront the young woman and condemn what she has done. Instead, he is seduced by her. Francesco is married and has recently become a grandfather. His fling with Carolina makes him feel young again, but he begins to neglect his family and his work.Invited to run off to Paris with her, Francesco writes a farewell letter to his wife and leaves for the train station. At the last minute, he comes to his senses and decides to return home, where Esperia pretends that she did not read his letter. ........

Source: Wikipedia