The story within the story relates that for no particular reason, Anselmo decides to test the fidelity of his wife, Camilla, and asks his friend, Lothario, to seduce her. Thinking that to be madness, Lothario reluctantly agrees, and soon reports to Anselmo that Camilla is a faithful wife. Anselmo learns that Lothario has lied and attempted no seduction. He makes Lothario promise to try in earnest and leaves town to make this easier. Lothario tries and Camilla writes letters to her husband telling him of the attempts by Lothario and asking him to return. Anselmo makes no reply and does not return. Lothario then falls in love with Camilla, who eventually reciprocates, an affair between them ensues, but is not disclosed to Anselmo, and their affair continues after Anselmo returns.