Do you "take him away" and you ban him from going to her home/anywhere near her or their kids
Yes.
But you find out through some other source ... that he's back in her home with her agreement.
He is breaching the non-contact. He is arrested.
What do you do then?
He is tried.
How do you enforce it?
Prison.
How do you "make" her realise the situation she's in or not have contact with him, if she won't do counselling or dies it but still takes him back
A small minority may never realise, but those perpetrators wont be free to brutalise the family - and continue the cycle of violence into another generation. Isn't that a great outcome?
We presently threaten and punish women (and their kids), it's time we punish the bashers instead.