Tú o nadie (1985)

Max and Antonio are stepbrothers, whose rivalry is raised when their father leaves all his property and money to Antonio. Max hatches a plan to take all of Antonio's money by marrying Raquel, a girl of humble origins that lives in the city of Guadalajara with her sister and father. Max marries Raquel under the name of Antonio and on their wedding night he is called away. Max leaves Raquel informing her that he has to go away on business. Max returns home to see his brother Antonio off on a business trip on a plane that he sabotaged, and when the plane goes down it is presumed that Antonio perished. Max plants the marriage license in Antonio's room, and their mother contacts Raquel informing her of Antonio's death and that she should come right away to the funeral. Raquel arrives and realizes the man she is married is not who she thought he was. Furthermore, it turns out that Antonio survived the plane crash, and when Raquel and Antonio meet it's an awkward encounter. But the two are drawn to each other, to Max's fury since he too has fallen in love with Raquel.