Webthe theme of roald dahl's lamb to the slaughter revolves around betrayal and revenge. The main idea is the unexpected and ironic reaction of a wife to her. Webneed help with the landlady in roald dahl's the landlady? Webthe landlady by roald dahl is a short story about a young man in search of lodgings that is taken in by a seemingly kind and gentle landlady. Webthe story is narrated by a wife who describes how she met her husband.