My ex-husband invited the former wife he believed was still childless and miserable to his family’s Christmas at their military estate. He never imagined I would arrive on a government tactical helicopter — with four eight-year-olds who had his face.

sitting out on the tarmac in the afternoon sun.

“But not the way he’s expecting.”

I made that decision in about four seconds.

On a Tuesday afternoon, at a desk, with four open files on a serious piece of work in front of me, looking out of a window at an aircraft.

I want that on the page plainly, because everything that happened on Christmas Day came out of those four seconds — and in those four seconds I was not thinking about my children at all.

I was thinking about a man’s face.

I did not think about my children for another eleven days. Not in connection with any of it.

They came into it on the Thursday, when I sat down with a chart and started working out logistics.

By then the shape of the thing was already set. It had been set since that window.

And the shape