El gave you great advice and IMO you should model her behavior.
I read your last post three times and the only thing I get out of it is that you are still trying to control him. If you are going to have this cake walk then only focus on what you can control. Use only “I”. I won’t be doing these activities anymore. I need to process everything and heal. My first priority is the welfare of the children. That is the only thing I am focusing right now.