Two English Girls (1971)

At the start of the 20th century, English teenager Ann Brown travels from Wales to Paris, where she befriends Claude Rob. She invites him to visit her hometown, where she lives with her mother and her younger sister Muriel. When Claude arrives at her home, both Ann and Muriel become his close friends, but Ann pushes Claude towards Muriel and they fall in love with each other.

However, their mothers propose they separate for a year and do not communicate to see if they have real feelings for each other. But after six months in Paris, Claude is seduced by many lovers and sends a letter to Muriel calling off their commitment. When Claude meets Ann in Paris later, they have an affair, but he still has feelings for Muriel.