It's true that she does not understand what he is asking of her this time. Fortunately, the same thought occurs to her anyway. She wants to make sure that Hermione is able to make it to the Nexus, or at least get herself unstuck.

"Let's go bring this to Hermione," she says after tucking the basilisk scale into the holster pouch. "Lead the way." The sooner they get out of the swamp, the better she'll feel.