I, The Mother of the 20 Pound 13-Year-Old

I swear, Petra is actually 13 years old. She acts like a teenager. Tonight, she was walking around the living room saying, "I look ugly in this!" and "I look stupid in this!" We were appaled and asked her who told her that. "I did." She insists that no one else has ever said that to her. I don't know where she gets it!! If she doesn't get her way, she stomps around and says, "I don't care!!!" If she's like this at 3, how will she be when she really is 13?!?