Answer:
The theme of "Lamb to the Slaughter" by Roald Dahl is the dangers of blindly accepting authority and the consequences of taking the truth for granted.
In the story, Mary Maloney is a devoted wife who trusts and relies on her husband, a police detective. When he reveals that he is leaving her, she is shocked and devastated. In a moment of panicked desperation, she kills him with a frozen leg of lamb, concealing the murder weapon and manipulating the investigation to throw the authorities off her trail.
Throughout the story, Mary is able to maintain her innocence and deceive those around her by appearing to be a typical, submissive housewife. However, her actions ultimately catch up with her, and the story serves as a cautionary tale about the dangers of blindly accepting authority and the consequences of taking the truth for granted.