So she told her sister it was $15,000 and her sister told you and you take her at her word??? Have you seen any credit card statements? Could be $50,000 for all you know. You mentioned she also drained the kids' accounts? ( I'm assuming that was college savings?)
Are you sure your name isn't on any of those credit cards? Again, I recommend you seek legal advice. And again, check the cell phone usage records.
Btw - how much does she earn? And how much do you? Is the idea of her paying off this $15k feasible?
Also check your credit report to make sure she didn't take out credit in your name.
