How can it be, I wondered, that we can be lying in bed next to a person we love wholly and helplessly, a person we love more than our own breath, and still ache to think of the one who caused us pain all those years ago? It's the betrayal of this second heart of ours, its flesh tied off like a fingertip twined tightly round with a single hair, blue-tinged from lack of blood. The shameful squeeze of it.