childish

why is my 6 year old such a baby? is that normal. I mean she cries over everything! my stepdaughter is 6 and doesn't act like that. She goes with her dad every weekend and he's the one that got her spoiled. how do I break her out of that. Today she had a temperature tantrum all because she wanted to wear a skirt (she's a girly girl ) it's like why can't she understand anything. I sit and try to talk to her and she don't want to hear it.