My 9 year old niece is such a brat. I will never go on a trip with my sister again because she has not taught her child to behave AT ALL. You can"t even stay in a motel without the child leaving the room and running down the halls. you can only eat at McDonald's or the child throws a rip-roaring tantrum. How do I tell my sister she needs to get control before it is too late (if it's not already)? Do I tell her? I am old, childless, and set in my ways...is it my problem? I'm really stressing about this.