Did speak with lawyer and lawyer did warn me I would be on the hook for 50% of any debt she creates
I'm no lawyer, but I do spend many hours on a certain "FICO"-type credit repair forum, and this is NOT my understanding of how it works. I believe that if you notify the cc company in writing that you will NOT be held responsible for any debts of hers going forward, they can remove you from that obligation.
I further believe that these are federal laws that govern, not state, so I don't even think it's one of those "it may be different in your state than it is in mine," but I could be wrong. "Joint property" (and other probate) issues ARE different state-to-state, so maybe that's what it is, I dunno. Certainly worth looking into further if you're concerned about it (and it sounds like you have good reason to be).