so my husbands mother has nothing to do with our oldest child she says that he is very disrespectful…

so my husbands mother has nothing to do with our oldest child she says that he is very disrespectful and dont listen to any adults.. im really pissed and so now every day its a fight with him cuz he says that were not hard enough on him.. first hes 8 and is a child not an adult and he gets punished when need be i just wanna leave i know that im going to have to deal with her the rest of my life but i dont want to