Oh hell, more unexpected bills my wife doesn't remember...

I never realized her memory is going so badly. A month or two ago we had to come up with $17,000 to cover a credit card she thought she'd been paying off, but evidently hadn't made payments on in years. Then tonight I decided I'd look through the piles of papers she keeps sorting through while watching TV and found another unpaid credit card bill for $16,000, a bill for a card we can't even identify, and a couple of other past due notices I'd never seen. I think I'm going to have to totally take over all bills but I feel like I'm I'm telling her she's no longer competent mentally as I go through the bills. She's always been a take charge person, very competent, but now it seems like it's just getting worse and worse. I feel like I'm losing her.