Miriam- A teenager?

We have assigned Miriam to collect the chicken eggs each day as we're trying (emphasize trying) to start a household economy with responsibilities. We got home today from some errands and I told her to go check the chickens to which she ignored me in favor of watching her movie she's been working on all afternoon. Eric said she couldn't keep watching and paused it saying he would go out with her at which point she started sobbing she just wanted to watch her movie. Then I said if she was going to put up such a fuss maybe she didn't need to watch any more movies. She then yelled several times on her way out "I can't do anything with you. I'm just a little girl, I can do it myself. I don't need little brothers, or daddies. I'm just a little girl I can do it myself!" then when she came in she took her DVD player off to her room to watch it by herself.
Oh boy are we in trouble!