So I left it alone. I did nothing.
Got a phone call last night that the situation is on the cusp of being resolved.
Not a request for help, just an update that good things are in the works.
See, they can do it without me!
Also, my older brother expressed confidence that #3 might enter into the same program that got him clean. I think his confidence comes from him realizing that if his life could be turned around there are possibilities that other things in our family could improve.
So instead of Fear, Anger, Guilt today I am feeling Strength, Hope and Faith.