My 9yr old is very naughty please HELP

My 9yr old daughter is very naughty (like most probably) She lies to me all the time, She has the worst attitude, The other day my 2 yr old said "alex naughty" (meaning himself) and she said back "cool" and then I said why did you say that? do you like it when he is naughty for me? And she said "yep"
just little things like that, makes me feel like I am a bad parent.
Has any one got any advise on a naughty 9yr old who thinks she is 14.. HELP
By hell_to_the_no 8 years ago :: Parent/Child
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