The English Waltz(1983)

Original title: Anglų valsas

Late 19th century England. Relatives and guests gather at the country house of retired Colonel Houp. From London, where she lives as a "live-in" (her husband has left the country for a long time), comes the still young Molly Gwyn, followed by Morris Lever, the object of a flirtation that risks turning into an affair.