Re: Physical abuse possible?
You need to always remember that your parents are not going to live with this man. They’re not going to have to deal with him every-single-day for the rest of their live. YOU will! The guy clearly has a anger management issue if he lost control and hit his older sister, younger sister, AND physically shoved his own mother! And I know plenty of people who has gone through major stressors in their lives and do not behave the way you’re describing this guy.
Based what what you wrote above, you would have to be a complete idiot to think that this man is going to treat you and your future children with respect. Married life is full of things that stress the couple out and there are many things you two will disagree about in the future. I have no idea why anyone would choose to marry a man who resorts to physical abuse during a argument. If he can hit his own sisters and shove his mother…what on earth makes you so special that you think he won’t hit you in the future?
I’m amazed that people are actually making excuses for his behavior saying he might be under stress! Are you frigging kidding me?!! 
**NOTHING…no amount of stress in this world justifies physical violence! ** A mature, grown man who is not abusive will walk away from a situation if he feels that his emotions are getting too intense. We’re not talking about siblings who are CHILDREN and playing around. These are adults who were involved in a argument.
You’re not married yet. Love alone doesn’t make a marriage happy. And your love alone is not going to keep him from hitting you or your future children. It certainly didn’t save his sisters did it?
Take it as a blessing from God that you’re finding out all this right now. It’s your life. If you don’t stand up and help yourself…then don’t expect anyone else to do it for you.