In today's message I mentioned the book "Boundaries" by Cloud & Townsend among other resources. Below are some links to help you begin evaluating what relationship boundaries might be needed in your life with resource suggestions to help you walk down that path.
https://www.boundariesbooks.com/ - They obviously want you to buy their book (which I also suggest) but there are multiple free resources through this site to help you get started.
https://bible.org/series/boundaries - If you don't want to buy the book, here is a 7-part lesson series developed from "Boundaries" that is free. It's not the same as the book but covers many of the same principles.
https://www.crosswalk.com/church/pastors-or-leadership/ask-roger/can-i-disown-my-family.html - While this is an opinion piece in answer to someone's question, I thought it was a good point of view I might share to anyone wanting to look at the question of "disowning" or "cutting someone off" permanently. As I cover in the sermon, I prefer the idea of establishing strong boundaries with strict requirement for anyone that wants to walk back through a closed gate. That protects us and still offers the potential for restoration. However in situations of abuse or when we can't handle contact with someone at this time, there may need to be what feels like a more permanent solution. This article addresses some of those ideas.