I don't see how that was a no no. You did your best to get him the help he needed, and you alerted family members as to what is going on with him so that hopefully they can take over as needed.
That's really all you can do right now, that and try to work out a parenting plan that protects your kids, and get your own financial house in order as best you can as there's no telling whether you'll be able to rely on him for support in the future.
