Nastagio initially felt compassion for the lady, who seemed so vulnerable to the knight’s anger. But by the end of the vision, he’s solidly on the knight’s side and has realized how he can use this vision to scare Paolo’s daughter into returning his love. Like the rest of the women in
The Decameron, she is vulnerable to male authority and occasional violence. The tale’s strong implication is that, if earning a lady’s love fails, it’s perfectly acceptable to blackmail and force her into capitulation.