I often hear from clients about the effects of P.A.S. during family events. This destructive pattern can be perpetuated into adulthood and in is part of a very passive aggressive pattern.
For example, when attending an event that you may not be invited to i.e. graduation at a public facility, do it for YOU and not the perpetrator, meaning the other parent. Enjoy your time and realize they have no control. If you are approached in a hostile manner, pull out your phone and record. I wish everyone the best of luck!!