I'd just survived much more than I ever thought possible. Did she see that? Did she know what I did to come after her through deep space? I squeezed her hand, maybe a little too hard, to remind her that I wasn't made of glass and to urge her to continue.
She looked up, her gray eyes sparkling wet, and brushed the tears from her face. "Research told me that iron would attract enough electromagnetic energy to shield you from the ghosts. But I knew I needed more than that, something to make you crave iron at all times so you would never have to be terrorized again. When I read about this parasite, I studied it, analyzed it, and I thought it might work."
"By testing it on yourself."
"At first, yes," she said quietly. "And it did work. Iron was all I thought about, but I kept it hidden inside my cheek around you and Pop. After I was sure it was safe, all I needed to know then was if it would still work to keep the ghosts away from you."