I don't really know your story So my opinion dose not hold much ground. But being in al-anon and nar-anon I know that he will make the attempt to make amends, and there is no reason to break no contact. Let him progress in his own recovery on his own time line.
I also agree with the others who pointed out the mother is just defending her son. And holds no bering on his recovery.
Just not time yet, let him grow. (just my opinion )