I am fed up to the back teeth of my daughter trying to over parent me..she is 8 and whatever I try and tell her brother to do she has to talk over me and try to parent him.. almost like I am incapable of doing it.. I don't know how to handle it.. I get cross and that doesn't work, I tell her it is rude and disrespectful and that doesn't work.. I walk away and leave her to it but that obviously doesn't work.. help!