I heard my girlfriend moaning on the top of her voice when I came to surprise her. Maybe she was watching a movie. Maybe there was another explanation. Then I heard a man's voice. My girlfriend had told me she was home alone and feeling sick. I had even stopped to buy her food and medication on my way there. I knocked. Everything went silent. A few seconds later, she shouted from inside, asking who it was. When I told her it was me, she didn't open the door immediately. She asked me to wait. That was when I knew something was wrong.