"Fine. Be my guest." She moves closer, giving him access to her back though she keeps him in the corner of her eye at first. "Maybe you'll have more luck."

Natasha's always healed well, which is a good thing considering what she's put her body through. But even healing well, even with the help of cutting edge medical tech, she's put her body through a lot. She's lucky some aches and pangs are a the worst of it most days.