The children are often turned against one of their parents by one of the adults.
A man or woman has the right to be a parent to their children.
When one is fifteen they see pretty clearly. If one wants to be a parent then maybe he shouldn’t have been a philanderer. BOR is a class A jerk. I have no sympathy for him.
When my fifteen year old quit talking to me or seeing me I kept the door open. As an adult we have a very good relationship. I led by example not by enforcing my will on another.