I am not a lawyer
But I have gone through a divorce.
as the guy making all the money of the family, which I was and am
my lawyer strongly suggested I pay support during the divorce.
even during my divorce, I was paying about $2000 or so each month.
However
Not every person in this world cares about his children so much as me or others.
I don't think I had to do it. My lawyer told me, it was a good idea, and I followed most everything he suggested.
I have flat out handed my daughters cash when I thought they needed it.
I'm really sorry, but I don't think legally, you can do much right now. Get the divorce. Then we all have to pays our children. Otherwise, it's the taxpayers.
Good luck!