My husband promised me he would be home for my birthday. He called that morning. “I’m sorry, sweetheart. The flight got delayed.” I told him not to worry. He promised he’d make it up to me. That evening, my friends surprised me with a party. Someone connected their phone to the television. “We made a birthday video for you.” I smiled. The first few clips were normal. My friends. My family. Old photos. Then the final video appeared. It was recorded from a hotel room. My husband was sitting on the bed. He was smiling at the camera. “Happy birthday, sweetheart.” Everyone laughed. I laughed too. Until I noticed the reflection in the mirror behind him. Someone was standing in the bathroom doorway. A woman. I paused the video. Nobody else seemed to notice. I zoomed in….