She doesn't see what the difference is. Doesn't fully comprehend a fish that isn't also a person. But she sure did fish one out of the water, so, you know. That's a start.

She doesn't argue anymore, doesn't even acknowledge his offer of a grass fire, just grabs the sandy fish and lets the tide roll over it a bit, rubbing off the sand.

Only then, after she's cleaned the fish with the water and started cleaning it with her knife, does she acknowledge his offer with, "We're good."

What that fully means is up to him.