"Lucky me, then. Unlucky for Steve, though, and I don't wish HYDRA on anyone. Look, Peggy, we were friends once upon a universe so...you mind me asking why you're so much taller than I'm used to?"

She's as tall as he is, if not an inch or two higher, and he's wondering what happened exactly. Is it super-soldier serum? If so, he doesn't wish that burden on anyone but especially not on someone he likes as much as her.