How does Roald Dahl use Irony and humor in short story Lamb to the Slaughtrer?

Roald Dahl uses irony in "Lamb to the Slaughter" by setting up a seemingly innocent domestic scene which quickly turns dark and sinister. The humor in the story comes from the absurdity of the situation and the unexpected ways in which the protagonist reacts to her husband's betrayal. Dahl's use of irony and humor adds depth to the story and keeps the reader engaged until the shocking conclusion.