Isn't this precisely why she admires him? Precisely why -- she dares to think -- she loves him? Peggy's whole countenance softened to see the fire burgeoning in him. Captain America: the man who defies surrender. Stubbornness and a refusal to be bested by circumstance. She'd learned from him how to refine those qualities in herself. Even now, she can see the difference between denial and dedication.

And perhaps she sees what she wants to see when she glimpses the opportunity to change other things. Her heart skips a beat to hear what he proposes. Against all best reason and practicality, she nods.

"Things can be done over. Fixed."

Is it him she wants to appease, or herself? A chance to put it all to rights might make her feel a little better about how much she'd mucked it all up. She could recant that tragic farewell over the radio. She could take him dancing. But not now -- not yet. Not with death clinging to walls of this place, and destiny to conquer.