Havana Quartet (1999)

Walther sees a video in which Lita tells him that she is his long lost mother. He flies to Cuba to meet her, and on the plane meets Segis. Segis tells him of his impending marriage to Diana, who it transpires is Lita's daughter by another man, and therefore Walther's half-sister. When the family is reunited, Walther falls in love with Diana.