Her clothes were different, too. Julia was wearing a dark skirt and a white blouse, sort of standard business attire. But the skirt was tighter than usual. And her kicking foot made me notice she was wearing slingback high heels. What she used to call fuck-me shoes. The kind of shoes she would never wear to work.

And then I realized that everything about her was different-her manner, her appearance, her mood, everything-and in a flash of insight I knew why: my wife was having an affair. The water on the stove began to steam, and I pulled out the bottle, tested it on my forearm. It had gotten too hot, and I would have to wait a minute for it to cool. The baby started to cry, and I bounced her a little on my shoulder, while I walked her around the room. Julia never looked at me. She just kept swinging her foot, and staring into space. I had read somewhere that this was a syndrome. The husband's out of work, his masculine appeal declines, his wife no longer respects him, and she wanders. I had read that in Glamour or Redbook or one of those magazines around the house that I glanced through while waiting for the washing machine to finish its cycle, or the microwave to thaw the hamburger. But now I was flooded with confused feelings. Was it really true? Was I just tired, making up bad stories in my mind? After all, what difference did it make if she was wearing tighter skirts and different shoes? Fashions changed. People felt different on different days. And just because she was sometimes angry, did that really mean she was having an affair? Of course it didn't. I was probably just feeling inadequate, unattractive. These were probably my insecurities coming out. My thoughts went on in this vein for a while.

But for some reason, I couldn't talk myself out of it. I was sure it was true. I had lived with this woman for more than twelve years. I knew she was different, and I knew why. I could sense the presence of someone else, an outside person, some intruder in our relationship. I felt it with a conviction that surprised me. I felt it in my bones, like an ache. I had to turn away. …