It's not that Natasha doesn't trust him, doesn't know how to let him make the call. She just also knows Steve is more than happy to put himself in harms way to protect others—and who knows how long he's been out here doing this.

She considers making another suggestion. Natasha could lead the giants away and lose them before doubling back and sneaking in herself. That would mean splitting up, though, and she can't say her idea is better. Just that it's an alternative.

"We'll go with your play." She voice is professional as she says it, hesitating only a fraction of a second. "See you inside, Rogers."