linguistic:voice_change, stylistic:tone
The Tale of the Fuller's Wife

In Book Nine the baker's wife attempts to hide her lover from her husband, and entertains to her husband's story of the Fuller:

While coming home with the Baker for supper, the Fuller interrupts his wife's love-making with a lover. She frantically attempts to hide her lover in a drying cage in the ceiling, hidden by hanging clothes soaked in sulphur. The lover begins to sneeze, and at first the Fuller excuses his wife. After a few sneezes, the Fuller gets up and turns over the cage to find the lover waiting. The Fuller is talked out of beating the young man to death by the Baker, who points out that the young man will shortly die from the sulphur fumes if left in the cage. The Fuller agrees and returns the lover to the cage.

The tale is used to contrast the earlier tale told to the Baker's wife of high suspicion and quick judgments of character by her 'auntie' with the overly naive descriptions of nefarious people by her husband.