This story starts out one night when my parents go out and leave me and my little sister home by ourselves. But before I go into that let me introduce me and my little sister. My name is Keith and I'm 17 years. I'm very fit at 5'11 and about 160 pounds. I have jet black hair with deep blue eyes. My sisters name is Brianna and she is 16 years old. She like my mom has long strawberry blond hair and blue eyes. She's very sex...