Sorry you are going through this but as we all know.....we are only accountable for our own sobriety.
As much as we want to support and help.....we can not take on the burden of another if it jeopardizes our own recovery.
Focus on you and your children. You sometimes have to let the others go.
I would have done the same thing. Actually I have had to let others go in my recovery because my sobriety comes first.
Stay strong and move on.