Just checked back in on this one, and I am glad for the comments Mominalberta and sunnydays! IMO he does get away with alot, and his younger sister does too ("she's just like xx" is the comment I hear often), but she has been with me long enough now that she knows that doesn't fly at my house. For example, yesterday my son was talking to her and she starting imitating him in a screechy voice and making a face at him instead of answering his question to her; which upset him understandably. I reminded her that this is rude (I think it is, anyway), and she said, yeah, and stopped. I despise rude kids, and am always reminding my son that its not nice to call other kids names, or say things like "loser, stupid" or call younger kids 'babies' as a put down. He is very polite and we get feedback from preschool that he is gentle and kind there too, which is nice. I just hope that it continues the older he gets!