She knew Simon had said that, although she'd been unconscious at the time, laying on a scanner in the Alliance hospital Mal, Zoe, Wash and Jayne helped them sneak into. That one machine, and so much effort from Simon to get her to it, in the hope that it'd do something it ultimately could not.
She knew. She'd read it on the minds of the crew after that, and Simon had made it clear while he tried to help her.
"I felt things. That you did. How much they hurt you."
It was her turn to look concerned. Simon had had it all in his notebook... was that Hannibal's again, now that Simon was gone? "I felt them like I was you. Normal people don't feel it like that. I know."