Hello to all, I have to share this story with you. My sister married a guy who is 4 years her junior, in his 20s. He came into our family and we welcomed him, all the way believe he was not using either drugs or drinking alcohol. No one assumed he was a drunkard, a violent one for that matter. Not even my sister, or else she didn't want to admit he was. Until one day, a few days ago, they had some argument and he hit her in the head. She is a petite person, very small and very skinny, so the hit in the head resulted in her losing her consciousness. I am not sure what to do about it. She said she didn't want to report him because he apologized later on, and he hasn't hit her ever since. How to approach him and help him realize he has a problem?