Superstitious
R. L. Stine
 Sara Morgan, a graduate student who has left an abusive relationship with Chip, starts a new relationship with a handsome professor named Liam O'Connor. Liam is extremely superstitious and lives with his sister Margaret, to whom he is very close. Sara does not mind these quirks and marries Liam. Shortly, people start dying in grisly ways, and it turns out the professor knew all of them. Sara begins to wonder if her husband might be the killer, while Liam's superstitious behavior increases. One day, after Sara discovers Margaret and Liam in bed together naked, she smashes the mirror out of protest and runs out of the house. She returns later to retrieve her keys only to find Margaret dead; she leaves afterwards in search of her boss' house. There, she spots her boss dead and Liam glaring at her. He explains to her that Margaret was his wife and that he needs Sara to bear their child so that the demons of superstition living inside of him can pass to the child. He went on to explain that when the demons slip away, they kill someone he knows; when Sara broke the mirror, the demons slipped out, murdering Margaret. Sara, in an attempt to show Liam that there are no demons, shatters one of the mirrors in the house. The demons slip outside of him and kill him; knocking Sara out afterwards. Sara awakens in the hospital to find out she is going to have a baby.