Nightmare in the Sun

Nightmare in the Sun 1965 is a film drama directed by John Derek and Marc Lawrence, and written by George Fass and Fanya Foss, about a murderous affair.

Beautiful young Marsha Wilson is married to a wealthy, jealous, mucholder man. She picks up a handsome hitchhiker one day, brings him back to husband Sam Wilsons ranch and falls for him.Marsha wants to run off with the hitchhiker, but he, too, is married and wont take her along. Sam returns home in a jealous rage, discovers what happened and kills Marsha with a rifle in a drunken rage. ........

Source: Wikipedia