Hey, thanks for your compliments to me personally. I would love to tell you something that will help you get your wife and son out. Truth is that I can't get my wife out. But I have stood up to the elders, and yes- I do recognize it was easier because I used to be one of them. I just wanted you to take actions since you were asking what you should do.
I am meeting with him this weekend and I will tell him how I feel about him "taking over". I will be respectful like I usually am, but firm. After that, everything having to do with the organization, my son and him will go through me. If this doesn't work, I will go up the food chain. I am tired of being the doormat in my own house and it has to stop.
That's great. Be firm. Really consider telling him that because of his making a financial arrangement with your wife and avoiding you, you would prefer that any studying with the boy comes from you and/or your wife and that he limits any contact with your wife and that such should go through you. Tell him you are the head of your household and will act as such. I wish you well on your event.