She won`t stop stealing, What do i do?

Well, if she continues like that, once she is older, she's gonna end up in jail! Not to be mean, but it's the truth . Does she still just from you or everybody? If she steals just from you, it's more likely that's she's jealous if you. Try to hide your money somewhere safe or tell your parents to keep it for you. But a alanr system or something. Lol. But anyways, I'm not saying for you to actually steal but act. Go to her room and take some stuff of hers. Then she will now what it feels to get stolen from and may stop. Once she stops stealing from you, return all her items back. But dont make it obvious that it was you who was taking the stuff. Just try things out. Stealing can turn into a bad habit and maybe even in the future be a criminal.