[fullmarriageequality]

Unfortunately, I think rollingrocker is right. There are US states where it isn't illegal to be in a consanguinamorous relationship, but I think even there the "common law marriage" would not be recognized.

You can marry a complete stranger, you can marry a murderer serving a life sentence. You just can't (in many states) marry someone of the same sex or someone who is a genetic relative, even if you don't have a family relationship sociologically. It is ridiculous.