A woman who has withstood years of cruelty does not leave over the largest cruelty; she leaves over some small, ordinary moment that happens to arrive on the day the rope finally has no fibers left.

For me it was a giggle on the far side of a phone call.

Not the affair itself — I had already found the reservation, already known.

Not even his absence at his mother’s death, monstrous as it was.

It was the sound of a young woman laughing, carefree, three feet from where my husband stood ignoring the news that his mother had died, and something in that small careless sound was simply the last thread, and it parted, and twenty years of held weight came down all at once.

I have made my peace with the fact that it looks, from outside, like an overreaction — like I left over a giggle.