Dressage (1986)

At a decadent 1930’s party, two very sexy and utterly shameless young women, Nathalie (Veronique Catansaro) and Eiliane (Cornelia Wilms) make a bet with a rich and handsome young Baron to corrupt two innocent teenagers in order to ruin their families’ reputations. The prize on offer is marriage to the wealthy Baron. The innocent and beautiful Nathalie, the illegitimate child of an aristocrat, seeks revenge on her father, Leroy-Murville (Henri-Jacques Huet). She is hired as the private teacher of her half-sister, sexy Sophie (Katya Strambi), and revenge takes shape using the most depraved teaching methods. Meanwhile, the seductive Eliane sets out to corrupt the teenage son of Colonel Montvilliers (Andre Nader) using similarly perverse methods.