So you know you are dealing with a very unscrupulous person. I feel like I need to reiterate that the best course of action for you is to discuss all this with a lawyer who can represent you, and not to agree to anything, or sign and accept anything, or have any more contact with him or the shady mediator attorney now. This is what I would do.

But I know we are different and you will do as you see fit. I’m sorry you are having to deal with all this.