There was no grief, no horror at what he had done, no flicker of the man I had married looking out at the wife and child he had nearly killed.

There was only calculation — the fast, cold, furious recalculating of a man whose plan has just failed and who is already, in the same breath, hunting for the next move.

He was not looking at his family risen from the floor.

He was looking at a problem that had come back to life.

And I understood, in that half-second, that the person I had shared a bed with for all those years, the person I had trusted with my son, had a place inside him where his feeling for us should have been, and that the place was empty, and had perhaps always been empty, and that I had simply never been given a reason to look into it before.

It is a strange grief, discovering that.