Acapulco Bay (1995)

Greedy and power-hungry Max Hauser assumes his stepbrother's identity and tricks his unsuspecting girlfriend Rachel Swanson into a civil marriage, in the hope that after Tony's death, he will inherit his vast wealth through Rachel, who the family assumed is Tony's widow. Rachel however refused to go with the plan and Max blackmails her to keep posing as Tony's wife. But things become very complicated for Max.