Narcs in the family....please give advice

Hello all, my mother has come to the breaking point and decided to file for divorce again, this time she's going through with it!!! My dad is a narc and it wasn't until my last narc that I realized this. I'm used to the dynamics which made me so attracted to narcs in my relationships. Every man Ive dated was an abuser! I've never had a normal man in my life. Now I don't know how to comfort my mom she has come to the realization that he is sick however she's still someway in denial as we all were in the beginning. I've sent literature etc...I still don't think she understands that these type of men exist and are real and yes this evil, as she says. I'm a so down because I hate to see her go through this. He is a total jerk and its only gonna get worse. He told her to leave him alone and that he doesn't care about her. I feel awful. I know the feeling, I've been there. She even suggested that she needs help, she can't sleep. I am in another state and I feel sad and very worried. I don't want her to go insane. Please help.