Dom Felice’s deception of Fra Puccio turns a scheme of adultery into a counterfeit spiritual exercise: while the husband keeps vigil to purify his soul, Dom Felice visits his wife and shares her bed. The joke depends not only on Fra Puccio’s gullibility but on his confidence in the monk’s religious authority. A regimen presented as a shortcut to holiness instead creates the very opportunity that the husband’s vigilance is meant to prevent.

Background and Opportunity

Fra Puccio is devoted to religious observance, but his marriage has left his wife wanting more than he gives her. He imposes frequent fasts, and when she would rather sleep or enjoy his company, he recounts sacred lives and sermons. Dom Felice, a young, attractive, quick-witted monk and a learned scholar, returns from Paris and forms a close friendship with Fra Puccio. The husband trusts him partly because Dom Felice answers his religious questions and appears exceptionally devout.

By visiting the house and observing Fra Puccio’s wife, Dom Felice recognizes her dissatisfaction and desires her himself. He makes her aware of his interest, and she is willing to respond, but insists that she will meet him only in her own home. That condition seems to make an affair impossible: Fra Puccio never goes outside the town. Dom Felice therefore makes the husband’s presence part of the plan rather than an obstacle to it.

The Invented Penance

Dom Felice presents Fra Puccio with a supposed short road to sainthood, one he claims is known to the pope and other great prelates but concealed from the laity. He says the clergy keep it secret because people would otherwise stop seeking their help and giving alms. The claim borrows the language of religious authority to explain why the remedy is unknown, while turning suspicion of clerical self-interest into bait for a man eager to become holy.

The prescribed discipline is exacting. Fra Puccio must first confess his sins, then fast and abstain from touching even his own wife for forty days. Each night near Compline, he is to stand in a place where he can see the sky, lean against a broad plank, stretch out his arms like Christ on the cross, and remain still until Matins. Because he is not a scholar, Dom Felice assigns him three hundred Paternosters and three hundred Ave Marys during the vigil, followed by prayers, at least three masses, and further prayers at church during the day.

The promise is carefully framed to make the exercise attractive: Dom Felice says that sins committed before the penance will be pardoned through it, while later sins will not count against Fra Puccio in the same way. He also assures him that, if he completes the practice with devotion and contrition, he will experience something of eternal beatitude before the forty days are over. Fra Puccio accepts the instructions and, with Dom Felice’s permission, tells his wife what he is to do. She understands the opportunity concealed in the night vigil. She agrees to fast alongside him, but pointedly declines to undertake anything more.

A Vigil Beside the Bedroom

Fra Puccio chooses a place adjoining the room where his wife sleeps, separated from it by only a thin wall. On most evenings during the penance, Dom Felice comes to supper with her, bringing good food and drink, then stays with her until the morning service. The husband remains at his post, repeating his prayers. The two forms of activity proceed at once: Fra Puccio’s effort to discipline his body and the lovers’ enjoyment of the time his discipline has opened for them.

One night, while the couple are making enough movement to shake the house, Fra Puccio pauses in his prayers and calls to ask what his wife is doing. She answers with a playful remark about tossing, but he takes the movement to be the result of fasting and her inability to sleep. He urges her to rest and tells her that her movements are making the place shake. His misunderstanding turns proximity into dramatic irony: he can hear the evidence of the affair, yet the explanation he has been given prevents him from recognizing it.

After that, Dom Felice and the wife move their bed to another part of the house. They continue their meetings there, while she returns to her own bed before Fra Puccio comes back from his vigil. The altered arrangement preserves the appearance of ordinary domestic life and allows the deception to continue night after night. The penance does not merely distract Fra Puccio; its schedule organizes the lovers’ access to one another.

After the Forty Days

The affair does not end when Fra Puccio completes his penance. His wife has grown accustomed to Dom Felice’s plentiful food after the low diet imposed by her husband, and she continues to find discreet opportunities to meet the monk elsewhere. The scheme therefore produces a lasting change in the household’s private life: Fra Puccio believes his spiritual discipline has improved his prospects, while his wife’s relationship with Dom Felice carries on beyond the period that made it possible.

The story closes by reversing Fra Puccio’s stated aim. He thinks that his penance is winning Paradise for himself; in the narrator’s ironic formulation, he has instead put Dom Felice and his wife there. The joke rests on the contrast between the sacred vocabulary of confession, fasting, prayer, and beatitude and the physical pleasures those practices conceal. Dom Felice’s supposed charitable guidance is not spiritual counsel but a practical device for gaining access to a woman, and Fra Puccio’s trust helps the deception succeed.

Narrative Frame and Satire

Neifile tells the episode within the Decameron’s sequence of stories. Before beginning, she connects her tale to the idea that religious authorities may fail to live by the truths they are expected to uphold. Dom Felice’s performance gives that contrast a domestic, comic form: the monk invokes the authority of prelates and church teaching while using the resulting trust for private advantage.

The tale’s satire is directed at the gap between apparent holiness and conduct, but its mechanics are deliberately concrete. The thin partition, the plank against which Fra Puccio stands, the repeated prayers, the meals Dom Felice brings, and the changed location of the bed all make the deception depend on routine rather than miracle. Religious observance does not reveal the affair to Fra Puccio; in this household, it supplies the timetable and cover that keep it hidden.