Dial M for Murder (1954) – Alfred Hitchcock
A husband plans a perfect murder for his cheating wife.
film-noir
The Postman Always Rings Twice (1946) – Lana Turner
A drifter has an affair with the wife of a roadside restaurant owner. Together they plot to murder the husband and make it look like an accident.
Strangers on a Train (1951) – Alfred Hitchcock
A slutty wife doesn’t want to divorce her cuckolded husband anymore because he has gotten successful in his career.