Seems unlikely that a Skrull would let herself get caught out so easily. But then, that could be exactly the point.

What about you, d'you have any ideas? [Beat.] No, nevermind -- better hold off until I get over there, at least.

[He visibly hesitates, then decides not to say anything further. Unspoken is the issue that eavesdropping doesn't really matter if one of them's already been replaced.]