Unhinged (1982)

Plot

Terry, Nancy, and Gloria, three college friends heading to a rock concert, find themselves in peril when a fierce rainstorm leads to a car crash that injures one of them. Desperate for help, they stumble upon a secluded house inhabited by a bitter, man-hating mother and her unsettling daughter. As they seek refuge, the trio quickly realizes that their decision to enter this home could have dire consequences, plunging them into a nightmarish struggle for survival against a twisted maternal bond.