LaMatadora is correct. I know I have been in the same type of marriage. My husband was not always like he is now, the more I let him abuse me the worse he got. I have been praying that the Lord, touch my husband and heal him from his addictions and evil spirit and he will one day. But until he does, I had to get out for the saftey of my children and myself. I have been married almost 22 years with verbally abuse and controlling at first, Not really seeing what was happening because I loved him and still do. And I did not think that I would be able to make it without my shusband. But... I see for the first time that I can't make it without God. You are correct to worry because where there is verbally abused and controlling alcoholic husband there is physcially abused as well. It may not be knock out abuse but.. if they slap you once it is physcial abuse. And he is not just abusing her, those kids are in being mentally abuse by hearing what is going on and living it daily and the cycle will continue on and on and on. Until the pattern is broken, I don't know how old her kids are, but... if she has faith and believes in the Lord Jesue Christ. He will bring her through this.
I still believe in marriage, and I believe that one day the Lord will heal my husband, if not for me then for my children. It hurts and sometimes I feel like going right back. But the prayers and love from my family and friends have shown me that I am worth more than that, I am worth more to God and he has blessed me everyday. Love her and pray for her.