Your real mother passed away when you were a baby, and your father remarried only a year ago to a woman who could be described as a "trophy wife". As a mother, she had a tendency not to be home, as she wasn't now.
In addition to a step-mother, you have a step-sister. She is downstairs on the couch watching TV and blabbing on the phone. She is an adult and probably should be in college, but she spends most of her time mooching off your dad and going from part-time job to part-time job. She also hogs the TV, even when she's not paying attention to it.
You are in no way related to her by blood, which is fortunate should you find her model figure and large breasts attractive. At the moment, she's wearing knee socks, short shorts, and a white t-shirt. She's annoying in any other sense.
You sit in the other room, looking at her from a distance. You're holding the wand, and wondering if it can do all it says it can...