Wow. So sorry for the mental abuse you have endured. I am surprised they went after you after so many years. Very unusual to pursue a non-member after so many years. The elders must not have been afraid of a defamation lawsuit or other fall-out.
I read your last thread. Were you ever baptized?
I hope you continue to get professional counseling, do some reading on Cult mid control, and keep a journal. Perhaps write letters to your mom whether you send them or not. Four dads (and breakups) would be hard on any kid. Your mom may be an abuse victim herself.
Work to get it out of your system so the toxins do not infect your marriage and kids.
Hugs from the Mrs and me.