And so when I knelt on that airport floor, the most important thing I could possibly do was not to promise him trips or toys or a bedroom of his own.

It was to reach into that private math and correct the single wrong number at the center of it: you did not do this.

You were never the reason.

I did not stay away because of anything about you; I stayed away because I did not know, and if I had known, nothing on earth could have kept me from you.

I do not know if he fully believed me that afternoon.