Thyroid disease and alcoholism?

Ok I have a question on hypothyroidism and alcohol abuse. So I was able to find out about hypothyroidism, like irritability and stuff which are some symptoms my mother in law has. She has the disease and takes a medication for it. BUT she is also an alcoholic. She has gotten worse to the point we cant control her and her husband is gonna leave her. *last issue was something were she asked him to cut her hair and he did and he cut it super short and she she went at him with the scissors, he went to go lock him self in the bedroom cause she was going nuts and she split the door frame to get away from him. Her other son picker her up and she was at his house we went there to get her side of the story and only got "i should have stabbed the fkr for what he did to my hair" "hes lucky I did not stab him" So as she was getting her hair fixed we went to the husband at their house to get his side and while there she called and heard our son (whos almost 2) and then called my cell and told me to come get her and bring her home the husband did not want her there and I told her that so she called me a "2 faced btch" * her calling me names and being nasty to me is the norm. We dont talk to her anymore but the husband said that she will be fine and then turns nuts and stuff.. Then a friend was talking about her recent issue about her hypothyroidism and how she had "been feeling and going nuts" as she put it and went in to detail now it was not as major as this story but she would get P.O. easily and such.. So I am wondering if maybe the abuse with alcohol and this disease is just maxing out.. I cant find any info on it. Any info would be a great help.. I dont talk to her but I can forward all info to other family members to help her. TY