He looked at me, and then he glanced at the nurse. “I can’t donate to her. I’m not O positive. I’m AB.” “AB?” The nurse paused, confusion filling her face. “In my thirty-two years as a pediatric nurse, I’ve never seen or heard of a child having O positive if one of their parents is AB.” He took a breath, holding it in. “That’s because I’m not her biological father.”
