The Last Temptation (1964)

Original title: Ο τελευταίος πειρασμός

A highly respected surgeon and University Professor becomes infatuated with a pretty young acrobat he meets accidentally in the park one evening. He quits his practice, dumping all his patients and dedicates his life to offering her a new home, money and his passionate love, also trying to sponsor her stage career in any possible way. She takes all he gives but it’s never enough for her and she doesn’t really have to give back much because the old man is head over heels in love with her.