When we first got married, my wife would hum almost every day, but recently things have gotten a bit stale and we've been having less and less sex, so she's been humming less and less. One day, while washing the dishes in the kitchen, she was humming for the first time in years. She seemed to be in a good mood recently, and her humming was pleasant to me. One day, while I was on the phone with my best friend, I heard my wife humming over the receiver. Her humming, which is usually pleasant, sounded like a message of infidelity...