Really? Who else have you run into? [Might as well find out who's been outed already. Of course, whether or not Pepper's cover lasts is still up in the air. As Natasha herself points out, they're at an impasse--but maybe there's a way to make use of it.]

What about the code to get into the lab? [Because that they exist is well known, but the real Tony Stark had designed his security well. Their team doesn't know it, but Natasha would.] If you enter it, won't that prove who you are?

[And if Pepper angles herself correctly, she might get another valuable piece of information.]