My grandmother had just spent a month proving how false that is.

Blood, it turns out, entitles you to nothing.

It is not love.

It is only a fact of genetics, and a person can share your blood and rob you and abandon you in a lobby without a backward glance.

What she was telling me, holding my hand in that study, was that the real thing — the thing worth the name of family — is not inherited but demonstrated, not owed but given, and is made not of shared DNA but of shown-up love, of the hundred and ninety miles driven without a question, of the standing-between.

My father was her blood and had proven himself no family at all.