That Saturday, it followed us up to the bedroom and watched from the corner as Eva lowered herself on me. Rain drummed on the roof. I was trembling. You’re scared, she said. No. Bullshit. Just cold, I said. That’s okay. Being scared is half the fun. You should know that by now. But I wasn’t sure what I knew except that she was silky-hot inside, and strong enough to hold me by the muscles of her pelvis and pin my arms to the bed so that I couldn’t have fought her off if I’d wanted to.