A Virgin for St. Tropez(1975)

Original title: Une vierge pour Saint-Tropez

Maria, a beautiful young woman, runs away from home with her older lover, across the Spanish border to St-Tropez, France. He says they will be meeting friends and getting married soon but instead they break into a house make love, stay the night and plan to come back later to rob the house, during which things go awry and secrets come out.