Midnight Passion (1983)

Irene changes her identity to Becky after a tragic scandal. While living as Becky, she falls for Armand, but is eventually blackmailed by his family over her past. She then reinvents herself as Leah, a high-fashion model. She engages in an intense, manipulative relationship with Jaime, a wealthy hedonist. When she eventually reunites with Armand, she finds herself torn between the man she truly loves and the matchless sexual partner who has awakened her darkest desires.