"As the North Carolina Supreme Court said, '[the law] forbids you to profit from your own wrong or to pluck good fruit from the evil tree of your own planting,'" Hunter's lawyer said.
Hunter is the woman who had an affair with Edwards. She is also the mother of their child.
The affair and the cover-up are outlined in Young's book.
One part of the book describes a sex tape showing Edwards and Hunter.
Hunter is suing Young to get back a copy of the tape she left behind in a house they shared.
Last month, Hunter gave ther court a deposition in the case.