Hatchet for the Honeymoon (DVD)(1972)

John Harrington (Stephen Forsyth) and his wife, Mildred (Laura Betti), run an exclusive salon devoted to wedding apparel for women. Although he seems a harmless fashion designer, John is actually a serial killer, doing in his young customers on their wedding nights. With each murder, John is able to see a bit more of the long-repressed memory of his mother's death. When he murders his wife, she returns to haunt him.