There's something you don't know about Me as your step-sister. You always wondered about Me, you always fantasized about Me being a bad girl. That's because deep down, I'm a little Demoness. What do you think our parents will think when they find out where I really came from? Poor you, just the spawn of regular human beings. The Devil is My real Step-Daddy. You're too pathetic to be My full step-brother. You're just a weak human male, and I'm going to steal your seed to sacrifice.