My 12-year-old son, Adam, returned from his classmate’s party crying—I found out why and I couldn’t stay silent.

I work as a cleaner for a large tech firm. The owner, Mr. Sterling, is a man who measures a person’s worth by the zeros in their bank account. His son, Julian, is in the same grade as Adam. When the invitation came, I had a bad feeling. I knew that family, and I knew how they looked at people like me. But Adam was so excited; he thought Julian was his friend. Against my better judgment, I let him go.