Stepsisters (1974)

Plot

A man teams up with his sister-in-law in a twisted scheme to murder his wife. As their plot unfolds, however, unexpected complications arise, leading to a series of darkly humorous and chaotic events. Their intentions spiral out of control, revealing both their flaws and the unpredictable nature of their relationship. The tension escalates as they navigate their precarious situation, ultimately challenging their original motives and forcing them to confront the consequences of their actions. What begins as a sinister plan transforms into a tangled web of intrigue and mishaps.