I did not stay because I was weak.

I stayed because I was being boiled slowly, one degree at a time, by a method specifically good at making sure you never notice the water is trying to kill you until it very nearly has.

The slap was the thing that finally showed me the temperature.

But the water had been getting hotter for two years, and the deepest damage Brenda did was not the blow.

It was the two years of teaching me not to trust my own sense that something was wrong.