I was, and I remain, a harmless numbers guy.

It simply turned out that the numbers were never harmless to the person who had lied about them.

And my mother was safe.

In the end, on a porch by the sea, watching her eat a slice of cake without apologizing for it — reaching, unprompted, for a second slice — that was the only number that had ever mattered, and the only one I will ever bother to keep.