"It is clearly bothering you. I feel if you didn't want to find out then you wouldn't have sought my advice." Especially given that Sookie had only seen him a total of two times, Hannibal thought. It seemed what she was really looking for was a reason not to, but Lecter was far too curious himself to say that she should pass up the opportunity.
"Perhaps knowing more about where and how your abilities appeared will help you to understand them better as well as yourself. A reason for your abilities may give you a purpose different to that of what you serve now." He smiled. "Nonetheless, this is my advice but ultimately, it is your decision."