From the outside, say if you were a cabdriver watching frantic jaywalkers scramble to cross the street in the final seconds before the light changed, it was only a mundane, urban snapshot: two seeming strangers, with little in common but their flimsy black umbrellas, passing in an intersection, making fleeting eye contact, and exchanging stiff but not unfriendly hellos before moving on their way.

But inside was a very different story. Inside, I was reeling, churning, breathless as I made it onto the safety of the curb and into a virtually empty diner near Union Square. Like seeing a ghost, I thought, one of those expressions I've heard a thousand times but never fully registered until that moment. I closed my umbrella and unzipped my coat, my heart still pounding. As I watched a waitress wipe down a table with hard, expert strokes, I wondered why I was so startled by the encounter when there was something that seemed utterly inevitable about the moment. Not in any grand, destined sense; just in the quiet, stubborn way that unfinished business has of imposing its will on the unwilling.

After what seemed like a long time, the waitress noticed me standing behind the Please Wait to Be Seated sign and said, "Oh. I didn't see you there. Should've taken that sign down after the lunch crowd. Go ahead and sit anywhere."

Her expression struck me as so oddly empathetic that I wondered if she were a moonlighting clairvoyant, and actually considered confiding in her. Instead, I slid into a red vinyl booth in the back corner of the restaurant and vowed never to speak of it. To share my feelings with a friend would constitute an act of disloyalty to my husband. To tell my older and very cynical sister, Suzanne, might unleash a storm of caustic remarks about marriage and monogamy. To write of it in my journal would elevate its importance, something I was determined not to do. And to tell Andy would be some combination of stupid, self-destructive, and hurtful. I was bothered by the lie of omission, a black mark on our fledging marriage, but decided it was for the best.