A part of her is shocked at him being proactive, but it's only because she practically bullied him to this point. She's been uncharacteristically patient, worried she'd screw this up just as well as her new role with the Avengers. Natasha looks up at him and her heart stutters. It borders on freaking her out before she realizes why she feels this way. Except then she's freaking out for a whole new reason.

"If I say 'yes' will you kiss me already?" Her eyes flash with something vaguely dangerous. She can tell herself she's training him up for someone real, but what's the point? They're already partners in every other way that matters. Is it so wrong to want this too? It takes everything she has to be patient, waiting him out still perched close to the end of her seat.