Teen prodigy has a secret

her sister is working on a masterpiece that will change the world that masterpiece she was working on is me that's the one that likes to take all of my money the moment I use my debit card or a prepaid credit card that's the one that makes phone calls and she can be in somebody's head and take over the moment they answer the phone and start talking on the phone to her this is the giant problem that I'm dealing with that I need help with and nobody's helping me