Lo Strano Vizio Della Signora Wardh (1971)

Synopsis
This dubbed Italian/Spanish thriller offers non-stop shocks. George (George Hilton) and his wife Julie (Edwige Fenech) are having problems. Not with each other, so much, but with Jean (Ivan Rassimov), one of Julie's old boyfriends. He had some unpleasant habits, including a penchant for outdoor lovemaking during thunderstorms, and seems to still be fixated on Julie. Women begin to be killed in frightening ways, and Jean looks like a likely suspect. Are they really dead? Is Jean quite the monster he is made out to be? There are plenty of surprises in store in this film, because nothing is quite what it appears to be. ~ Clarke Fountain, All Movie Guide