Erotic Blackmail (1974)

This provocative film explores the hidden world of a couple, Hugo and Valerie, who engage in open relationships involving other couples, financial incentives, and blackmail. When they invite Max and Dauphine for a countryside getaway, they unknowingly become part of a larger game. Etienne and Julien, tired of observing from the sidelines, decide to actively participate. While the couples are alone in the villa, they attack Valerie and Dauphine. The film questions who is truly vulnerable and who is manipulating the situation.