My 20 year old daughter lives at home, drives my car, and uses my credit card, and goes to college on my dime, but when it comes to me having any control over her she says "you can't do anything I'm an adult now, I'm not a kid." But sometimes she acts very much like a 12 year old and not 20. She has begun using the credit card I gave her to buy gas (so she can commute to school, it's much cheaper) to buy other things. I let her use it to buy groceries and toiletries but she started going overboard. She uses it to go out to dinner and dunkin donuts all the time. I looked in her closet and it's filled with hundreds of hair products and tooth whiteners and other things like lotions and I know none of them come cheap. When I gave her the card we had an agreement it was for only groceries and gas but since you can buy groceries at the same place as toiletries (and many other things at walmart) she seems to be buying whatever she doesn't feel like using her own money for. I got the credit card bill last month and it was over $700. I thought I could just make her pay it but her bank account is empty, she has no money! She knew I had to pay it off anyway to prevent my credit score from going bad (it's under my name but has her name on, it so she doesn't have to deal with the debt, i do) but she still owes me money. Her solution to her owing me money is to ignore it. I tried to take the card away from her but she hid it. Can I punish her? Can I take away her computer even though she's 20?