Alyssa spent most of the day with Natalie, suggesting I go out and actually spend time with my friends. I hadn't neglected any friendships, as everyone had known at school how close I was to my sister. None of them knew that I was now sleeping with my sister. I had no idea if Charlotte had told any of her friends that she was now sleeping with our father, but I certainly wasn't going to tell anyone, and I knew Alyssa thought the same.

Returning home just before dinner, my father pulled me aside, letting me know that Emily and Crystal were out for the evening and were likely spending...