A Strange Love Affair 1985 on netflix

Film professor Michael falls in love with one of his students and is confronted with his pupil’s father, with whom he had an affair over 15 years ago. This unexpected meeting abruptly overturns the lives of all the characters. When the tutor decides to undertake a planned trip to London, not with the son but with the father, he is once again forced to choose; this time between his wife and his friend.