your sister Dottie, is your older sister, and one day, she brings her boyfriend home with her, and they go in her room and close the door. You hear giggling, then sudden screaming. Not from Dottie, from her boyfriend. You run upstairs and rip Dottie's fangs from her boyfriend, and they tear skin from her bf Dottie: Okay, okay. I admit it, I'm a vampiress.