My Sister from another planet

My mother the queen went to visit planet earth she returns home with a little girl cute sassy but intelligent I thougth that she was just visiting for a few weeks but it turns out she was my new sister from another planet and I don't know how am I going to be living with her for the rest of my life is everything still gonna be the same before she arrived? or is everything gonna change before I even get to know her more then I thought?