Kevin crossed to the door and pulled it open.

“She’s asked you to go, Mom.”

She stood there, waiting.

He went on holding the door.

In the end she collected her photographs together and walked out.

Four seconds.

Possibly five.

I have talked about this with the person I see on Tuesdays more than any other moment from that day, because it is the moment people want me to be grateful for and I have never quite been able to be, and I have had to work out why.