Machete (1958)

This 1959 film-noir take on "Othello," filmed in Puerto Rico, stars Mari Blanchard as flirtatious Jean, who marries an older man, plantation owner Don Luis, for financial security and finds herself falling for his virile foster son, Carlos. Fearing that Jean will inherit Luis's money, his greedy cousin, Miguel, poisons the bridegroom against his new wife, informing him about her passion for another.