I am looking for a way for my husband's father to legally "freeze" his wife's ability to access money and credit. For as long as my husband can remember, she has been a binge spender (her latest has been over the past 14 months and adds up to at least $80K on an internet clothing business that has not sold 1 product), depleting now all except for a 401(k) with $40K (before paying off the tens of thousands of dollars in credit card debt). My husband's father is now well into his 70s, and will not be able to work much longer to pay for her habitual spending. And, at this point it's affecting his health since he cannot afford to have any preventative (elective) medical procedures because they have virtually no money. She is extremely resourceful and always finds a way to get more money or more credit (she's photocopied her husband's credit/debit cards for use without his knowledge, stolen his computer passwords so she can transfer funds, and even stolen her own son's identity to obtain multiple credit cards when he was a freshman in college!!). She is literally spending herself and her husband out of house & home. And, after my husband's father dies, it will be our responsibility to ensure she doesn't go homeless...and, it will also give her motive to attempt to steal the savings we've worked hard to accumulate. If this were not going to affect my husband and myself in the near future, I would not care less, but her spending now could affect our financial future for decades to come. Is there a specific field of law that would help with this? She is not incompetent; just completely stupid and selfish. Please help!!