And Maya, who had done all of it, had sat across from me at a hundred dinners and never once felt like anything but my sister.

That is the part no one prepares you for.

The real thing does not announce itself.

It passes the potatoes.

It cries at the right moments and remembers your birthday and calls you brother in a warm voice, and it is capable, in the same week, of standing over its own collapsing father and choosing a notebook over his life.

I had been looking for a monster with the wrong equipment my whole life, scanning faces, when the only reliable instrument was the one I had refused to use: not what a person seems, but what a person does when they think the cost falls on someone else.