Despite the rocky start to their relationship, Casey grew progressively closer to her new doctor, Miguel Garrido, over the following days. She learned far more about neurology and her condition in just a few conversations than she had in almost a decade of unbearable headaches. At first Reyes had hovered over their meetings, relentlessly watching over Casey, pacing and demanding more answers than Dr. Garrido could give.

Finally, Casey turned to her lover with irritation while ...