My son stood up for his little sister when another student wouldn’t leave her alone. The school called me about what happened. I couldn’t have been prouder of his courage.

“Nobody leaves.”

Mark stared at me.

I could see the battle happening inside him.

Then, finally, he reached into the inside pocket of his jacket.

He pulled out an old envelope.

The paper was yellowed.

Creased.

Worn at the edges.

My name was written across the front.

My handwriting.