Without Honor by Irving Pichel

5.20

Jane, a housewife, is confronted during her daily chores by Dennis, her married lover with whom she has had a long affair. Dennis tells Jane that he has to break off their relationship. She threatens suicide, but when she picks up a shish kabob skewer, the two struggle and Dennis is stabbed in the chest and collapses. Jane hides the body in the house. Before she can leave, her brother-in-law arrives and tells her that he knows about the affair and that he has invited her husband, her lover, and his wife to her house that evening so that he can tell them about the affair.