How do I tell my friend her husband may be psychotic & sexually deranged?

My friend’s husband helped me pick up a couch with his truck the other day, and made such degrading and violent sexual comments about women it totally shocked me – I was repulsed. He seemed to not have a clue that this was offensive & instead took delight in it & was obviously out of touch with reality. I am terribly concerned about their 6 year old daughter being around this man. How do I tell her this? She HAS to know he’s terribly mentally ill. She has told me she has dreams that something is trying to sexually harm her little girl. Now I know for sure! Any advice?