You'll be my Baby(1999)

Joan, a 22-year-old baker engaged to María, rents a room in an apartment owned by a 68-year-old woman, La Tieta, and her eccentric nephew Oriol. La Tieta introduces Joan to a new, sensual, and mysterious world with a unique aesthetic. Oriol, who adores his aunt, helps open Joan's eyes. From that moment on, everything is turned upside down, his relationship with María breaks down, and little by little, he falls in love with La Tieta, and she with him. A love story begins to blossom.