Bella's friend, Julia Delmont, becomes Ambrose's next target. By now completely corrupted and happy to go along with whatever Ambrose suggests, Bella readily agrees to the Father's next scheme: She will offer herself to Monsieur Delmont, on condition that her face is covered. The trick is that it will not be Bella who lies there, but Delmont's own daughter. Father Ambrose seduces her and says he will come to her by night and make love to her, but she must hide her face.
When the act is consummated, Bella appears and pretends that it was all a big mistake. But since Delmont has now potentially impregnated his daughter, the only way to be sure his incest cannot be discovered is to have all make love to her as well. In case she is pregnant, nobody can claim that her own father is the father.
Bella and Julia eventually become nuns, and the book ends as they participate in an orgy with 19 priests.