Thank you.I tried to warn you ahead of time. This really is a nunya situation. You know...nunya business. This is the brother-in-law's situation to deal with. We can't give YOU advice because you're not involved.
If your brother-in-law can't be bothered to make time to figure things out then he either needs to hire an attorney, or just sit back and let pass whatever may come to pass. There's nothing you can do for him.