Guys like these - if his sister came to him and told him she was in this kind of situation with some guy, he would get pissed off and tell her to leave him immediately and he would help her talk to him about it if needed.

Please, try to familiarize yourself with the tons of free materials about abuse and the warning signs. One of my clients got hit in the nose with a fist this year... after years of a "just" verbally abusive relationship.