I didn't see that the husband was violent toward her; that family situation is not healthy overall, for her, or the children. If it were up to me, I would get the wife in rehab, the children staying with grandparents/other family relatives for awhile and the husband in therapy. However, doesn't sound like there's anyone in the family who is making very good decisions; If I knew another concerned family member, I'd call them and ask them to work toward helping them with/without family services.

I would not want to get very involved, personally, though because it would be very frustrating long-distance and probably not ultimately helpful since continuous follow-through on my part wouldn't be possible so I'd just end up feeling stuck involved/caring about someone else's seemingly unsolvable problem. I have enough trouble with my own family problems.