Two Weeks in September(1967)

Original title: À cœur joie

Cecile is a young and beautiful Frenchwoman married to a much older Englishman. She loves her husband and seems content with her life, until she meets a younger man and feels forgotten passions stirring within. She now finds herself confronted with a choice: stay with the steady and peaceful love of her husband, or run off for excitement and adventure with a new love?