Wow, your sister has some problems, obviously. Maybe you can try telling her that you know what she is doing, and it's not only horribly WRONG, but it's selfish on her part because she is in danger of having her children taken away if she continues this, not to mention never being able to work as a nurse again. If she still chooses to steal money, then she is letting everyone know that money is more important than her children and career. You need to make her realize that the statutory maximum sentence for EACH violation of Title 18,(Stealing money with credit card fraud) United States Code, Section 1343 is 20 years in prison, a fine of up to $250,000, or both. Of course, this is the MAXIMUM, but Im sure the judge wouldn't think too kindly about a woman stealing from elderly and sick people. You need to give her ONE warning that you know what she is doing and she needs to stop right now, for the sake of her children at least. If she continues to do this, you really need to turn her in. All these people she is stealing from are losing money on top of paying expensive medical bills, and thier families are affected as well.