Morbidness(1972)

Morbidness is a psychological thriller following newlyweds whose honeymoon in a remote forest caravan becomes increasingly unsettling. When the bride becomes obsessed with a nearby house and begins sensing she's being watched with disturbing intensity, tension fractures her marriage. As paranoia and desire blur together, the couple must confront whether the threat is real or born from her deteriorating mind. The film explores isolation, obsession, and the fragile nature of trust between two people cut off from the world.