Mistress for a Couple (1980)

Georges is head over heels in love with Claire. Since he still has nice feelings towards his wife (Brigitte) he would like to simply divorce, but she has the money. He decides to ask two killers Max and Edmond to do the job. Brigitte, being a gorgeous lady, has no trouble seducing both men and ruling them. So she asks them to kidnap Claire and have some fun with her. They film the scene and show it to the husband.