My daughter, at sixteen, had done something far more powerful and far more durable: she had stopped letting the world’s opinion be the thing that decided her worth.

It was the bravest thing I had ever seen her do.

And it was exactly this newborn, hard-won freedom that my sister, an hour later, would set out to destroy.

Chapter 3 — Gwen Arrives

My sister, Gwen, had invited herself along on our vacation, in the way she invited herself into most things, and she spent the majority of it behind a phone camera, directing everyone else’s lives into an endless series of photographs.

“Take it again.