My best friend got married to my sister, who has Down syndrome — while she was fighting for her life, he gripped my hands and said, ""Now it’s time for you to understand WHY I REALLY MARRIED her.""

I was seven the first time I realized my sister was different in a way the world might punish her for.

She was six, only a year younger than me.

Her face brightened whenever someone spoke her name with kindness.

Most children did not.

They pointed at her and laughed.

They teased her until tears filled her eyes.

I would step in front of her like a tiny shield, fists clenched at my sides.

Ben, my best friend, was the only boy who never hesitated.

“Rosie, you’ll always have Ben and me,” I told her.