Midnight Vendetta (Thy Neighbor's Wife) (2000)

Ann, a beautiful young woman (KARI WUHRER, 'Eight Legged Freaks', 'Anaconda') risks everything and seduces a client to help her husband's career. But when he is fired and then tragically suicides, his young widow is pushed to the edge of insanity. Bent on revenge she seeks out first her husband's boss and his mistress, and then Nicole (BARBARA CRAMPTON, 'Space-Truckers') the woman who became her husband's successor. Under the guise of housekeeper, Ann slowly and seductively works her way into the woman's house and then under the skin of each member of her family. Using her sexuality to devastating effect, Ann seduces Nicole's husband then turns her attention on Nicole's son and her drifter daughter. No one is safe from her deadly charms and she won't be content until everyone has paid - in full.