I have a pet theory about how they do it. I was trying to explain it to people (just a few, hubby, mom, that sort of thing) and I finally hit on it.
You see, my ex lies to me about things that he and I both know to be false. Or do we both? At some point in time, the X comes up with an alternate version of a story that makes him look good and me look bad. Then, he starts telling people that story as a self protection method. He backs it up with made up facts. He repeats the story to his girlfriend. His mom. His brother. His boss at work. Etc. One day, he stops remembering what truly happened and starts believing his own story! He's brainwashing himself! AND if he is presented with facts that are contrary to his story, he will accuse ME of fabricating things! HA!
Example: X recently lost his bid in court to have Michigan take jurisdiction. I received an email shortly thereafter where he stated he considered it a victory because I "conceded all further action would take place in Florida"
A week later, X explains the reason he cut off all negotiations and took me to court in Michigan was partly because I "insisted he acknowledge Florida had jurisdiction".
This was one of the friendlier exchanges. I won't go into the messier ones, it's just not worth it!
If he is verbally/mentally abusive to the children as well, you need to petition for any protection that is to cover you to cover them as well.
The truly sad thing about this, you will not discover till after you have left him. A controller does not care to relinquish control. Divorce will not make him realize his lack of control and he will continue to be a thorn in your side for quite some time. Do not feel sympathy for him or try to be nice in the divorce. He may be nice at times, but habits formed are hard to break.
Tig