Not to sound too morbid, but if you are dealing with a terminal version of cancer then I wonder if she is trying to set it up so that the kids are entitled to your social security checks and benefits if you die.

I would assume that the kids would already be entitled to that if, in fact, she has you listed as the father, but she might not have done that.

She would have to be a pretty terrible deadbeat to sue a guy who is fighting cancer to try and benefit from his death but she kinda sounds like a pretty terrible deadbeat from your original post.

Also, you might try calling any law school in your state and ask if they have a legal aid clinic that can help. Many law schools have programs set up where their students get valuable experience by helping financially strained people like yourself. If all else fails, you might look on the law school's websites and find the "domestic relations" professors and email them directly to see if they will offer students the chance to get some experience researching and drafting documents by helping with an incredibly unique case. The asexual nature of the marriage might be unique enough to warrant a law review article of some sort; which would mean one student would become very invested in your situation as they would be writing an academic paper (with hopes of being published) in an effort to influence legal policy/opinions/etc.