Does my father's fiance have any rights over me?

My mother died of cancer when I was 10. I can't stand my father's fiance. She's already taking too much space by living with us and trying to act like some type of authority figure. I had an argument with her, called her a stupid ''*****'' and she replied back. I shoved her (I'm bigger, stronger and skillful than several other girls and average untrained Joes) to the ground and left.

Now I'm grounded. Does his fiance have any rights over me?

Does my father's fiance have any rights over me?
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