The seventh day of the Heptameron is devoted to stories about people who have acted contrary to their duty or desires.
Saffredent tells the story of a man who is reconciled with his unfaithful wife after she had lived for about 15 years with the Canon of Autun. Some of the listeners see in this story the moral of the woman realizing the error of her ways, but Simontault cynically points out: "you have forgotten the chief cause of her return to her husband, which was that the Canon was eighty years old, whilst her husband was younger than herself; so the worthy lady had the best of all her bargains. Had the Canon been young, she would not have been willing to forsake him, and the admonitions of the ladies would have been as ineffectual as the sacraments."
Longarine tells the story of a slip of the tongue and how it ruined a woman's reputation.
A man turns down a woman's advances and as a result earns the esteem and admiration of his wife and friends.
A woman wishes to test her lover's faithfulness, and in so doing drives him to become a monk. She then tries to win him back but he remains faithful to his vows.
Geburon tells a story of a fake miracle. The story is surprising given the religious credulity of the times.
An affair is accidentally revealed.
A woman chooses to be marooned with her husband on a desert island off of Canada, rather than abandoning him to his fate.
An unfaithful apothecary is slipped a love potion by his wife, with very painful results.
A man dresses as a serving girl in order to seduce one of the maids. Works every time? His wife discovers him and laughs at his folly.
A married woman declares her love for another man; and things end badly.