Kill Me Tomorrow (2000)

Tricia, the most attractive girl in Mountain Glenn, is in love with Russell, the town hot shot. Holly Peacock, a strange new girl, has stolen him away, luring him with illicit sex performed in cemeteries. When Tricia finally faces Russell, sparks fly. Holly reveals that she is an evil witch with demonic powers and her lust for sex is just a cover for her hunger for murder.