Gianni, since he is a pious and faithful man, doesn’t fear anything that comes in the night, but Monna Tessa must still come up with a way to secretly communicate with her lover and warn him off. Her clever plan hinges on having received secret religious knowledge from an anchoress (holy women who lived out their lives enclosed in small rooms attached to churches). Her prayer includes enough detail (such as the erect tail and her husband’s presence) to be unmistakable to her lover, and thus she successfully tricks her husband without getting caught.