About six months after we moved into our old neighborhood, a man named Tom moved into the house across the street. He seemed like a friendly guy and would wave and say hello if we were unloading groceries or taking out the trash. Sometimes, if we were working in the yard, he would come over to check out our project and chat. At Christmas time, we left a tin of cookies on his porch just like we did for our other neighbors. I wouldn't say we had become friends, exactly, we didn't go to his house for cookouts or invite him to our house for drinks. Our conversations were usually just small talk; complaining about dandelions in the lawn or gas prices, the weather and such. We didn't really know much about him. He was just a nice guy who lived across the street. One day, about a year later, Tom mentioned something about his wife, Darlene. We were dumbstruck. Tom had a wife? We had never seen her or heard him talk about her before. ...