Man is a Woman (1998)

Simon Eskanazy is a thirty-year-old gay musician. Born into a Jewish family, he took great pains to accept his homosexuality, and to get his family (including his mother and his uncle, Salomon) to do the same. The latter, Uncle Salomon is a wealthy banker who offered him a deal: he'll give him 10 million francs and will bequeath his mansion to Simon only if Simon agrees to marry a woman. (wikipedia)