What is conflict does Eric Gage experience over the course of the novel, Murder List?

To all appearances, Eric Gage is a good man and a devoted husband. His wife's bitterness, however, combined with his own guilt over the accident, make him vulnerable to her hideous demands for justice. Eric is seriously conflicted over Nina's insistence on Regan's death, and he uses the emails and faxes to Regan as a means of warning.... perhaps hoping that he will be stopped before he actually carries out Nina's wishes.