Indecent Proposal (1993) on Netflix

A young couple very much in love are married and have started their respective careers, she as a real estate broker, he as an architect. She finds the perfect spot to build his dream house, and they get loans to finance it. When the recession hits, they stand to lose everything they own, so they go to Vegas to have one shot at winning the money they need. After losing at the tables, they are approached by a millionaire who offers them a million dollars for a night with the wife. Though the couple agrees that this is a way out of their financial dilemma, it threatens to destroy their relationship.