Grandma's warm expression hardened instantly. "Don't call me Mom. I don't have a son like you."

Robert flinched at her sharp tone but didn’t back down. But he had no choice, he must’ve had a reason to be here.

I knew what that reason was. After all, he wasn’t here out of guilt or love. Instead, he couldn’t stop obsessing over Grandma's fortune, afraid it would end up in my hands instead of his.

Robert forced a smile, feigning sincerity. "Mom, I heard about your ...