My husband’s family is controlling and manipulative much like himself and
they like to punish my children even when I am right there. I have to put a stop
to it when I am around them but just like my husband, I do not trust them alone with the kid’s. My husband wrote them a letter telling them off and has not spoken to them in over 5 years. We relocated to another state and I am fearful that in the divorce he will reconcile with them and I do not ever want my kid’s leaving the state with him to go see them or being alone in their care or his for that matter. I would like them to see their dad and grandparents -just supervised and locally. Is there such a permanent arrangement?

You can seek a provision in a custody order that prevents your husband from leaving the children alone with his family, and will have to prove to the judge why such a provision is necessary.