She shouldn't do that in front of him. She's noticed before that it makes him twitch, but not always. Or maybe sometimes she's just too focused on what she's doing to pay attention.

The hunting is the best part, the skinning is dull, but the rip is...

"How about you?" she asks after the silence has settled for a moment. Rachel doesn't look up, eyes down as she finishes up, listening to him set up the fire. "Did you finish that math thing?"