My brother’s wife slept between my husband and me every night… until a sound in the dark revealed she wasn’t there for comfort.

By the seventeenth night, I had learned to sleep the way people do in uneasy houses—with one part of my mind never fully resting.

So when the click came from the hallway outside our bedroom, I opened my eyes before the sound had even died.

Lucía’s fingers found mine under the blanket at the same instant, and the way she squeezed told me this was not the first time she had heard it.