I'm surprised some don't see the difference in a husband/wife confessing to killing their spouse but not confessing to killing their children. I can think of several reasons for him to only confessing to killing his wife. Hoping for lesser charges, not wanting his family, SW family and friends to think he murdered his own children, not wanting the world to think he murdered his own children, not to mention other people in prison don't take kindly to child murderers. A parent killing their own child is always looked at worse than a spouse killing a spouse and rightly so. Any mother or father who can murder their own child is a monster.