I think it is highly unlikely that you will get prosecuted for bigamy under these circumstances, and you ought to tell your mother where to shove it, and how hard she should do so.
That being said, this whole situation is a disaster, and you need to address it now. You need to whip out your checkbook, and go hire a lawyer who does divorces to help you sort out this mess. You can also contact legal services in your area if you don't have money to hire a lawyer. This "double marriage" problem is not going to go away. Address it now. A good lawyer will help you sort it out, help you get rid of the incarcerated husband, and move on.
Hope this helps.
Bob Keach
Answered on Nov 30th, 2012 at 8:13 AM