The Unholy Wife on AllMovie

In this crime thriller a young woman marries a wealthy vintner. Soon afterward, she falls in love with a handsome rodeo rider whom she sees every time her husband is away. One night, her mother-in-law spots a burglar outside the house and reports it to the police. The conniving wife sees a window of opportunity and plots the death of her husband, hoping to blame it on the burglar. Unfortunately, she accidentally murders her husband's friend. Fortunately, she is able to con her husband into taking the rap with the promise that he will be acquitted. During the trial, she lies and he is put away. Later she gets hers when her mother-in-law is poisoned and she is convicted of the crime. The irony of it all is that the wife is innocent of that crime.