have you considered full custody.
This. Jerry .
You just might have to do this. Sorry, you might have no choice. I and many have been hinting to you this. She just might need a little more help right now then she is getting.
Her latest to you of needing a Psychiatrist, might be an answer to a prayer. I truly hope she gets the help she needs, can be a good mom and co parent with you. Right now she is not there. Given time and if she is really willing to work on it and get help, then maybe she can be.
You are doing a majority of it, and that is OK your son is so blessed as you are. She just is very ill Jerry. You need to face it, as I know you are. Keep me updated, thanks for being there when I needed kindness. I wish you well.
You can get through this. Stay heart strong and be blessed.