Brendan...Are you here in the state of utah ?
If so there is a program that can help your mom and dad a great deal, its called lifestar. Its a program that was created to help people over come there addictions to porn..its amazing. It also has a program for the spouses of the addict.
have your mom go here...
Sexual Addiction Recovery - LifeSTAR Network
I wish you and your family the best, and i'll keep you in our prayers.