I have a bratty relative who is living with me right now (I'm forced to). The problem with her is that she constantly fights with me over every little thing (most of the time, I let her have her way). Like during dinner she would fight for every piece of food like a starving hobo, whenever we go out for meals she would mooch me off for food, and I also caught her stealing my stuff (although she guards her own things to the point where it implies that she thinks I would actually steal anything from her). She is quite young like me and still depends on her parents for a living. However, she is old enough to be expected to have manners. Although she hasn't stolen anything significant from me yet, she's still gettting on my nerves. Any suggestion on how I can handle a brat like her?