Sister spending a whole load of money on my credit card?

Wow this is terrible and no way to treat a sister! You deserve way better than this! The first thing I would do is demand for the credit card back if she still has it, to avoid any further spendings. If she doesn't give it to you then you have a right to cancel the card or call the police since she pretty much is stealing it. Once you get it back, hide it from her. Rather it's in some drawer, a locked box or buried under some books wherever just get it out of sight/reach from her. Next, ask he nicely if she would hand you some money to pay for how much she spent to get the baby what it needs. If she denies, don't har her about it. You shouldn't have given her the money especially if she isn't nice to you.That was the babies money and not only that but how is your boyfriend going to feel about you giving her the money? If he asks you be honest because you guys need to be honest with each other. Also does she live with you? If yes, tell her to get a job and leave. She is untrustworthy and unsafe, and not to mention just plain rude! It's not being mean- it's being nice actually because she needs to open her eyes and see how shes treating people. If she's too young to leave send her off to one of your family members because she is pretty much a thief and shouldn't be living with you; especially at a time in your life where you re going to have a child. By the way, don't be mean about it because you don't want to get into a physical argument or hurt anyones feelings. If you guys are young then when you get older you guys will probably be like two peas in a pod; it happens with everyone usually.