Caitlin frowned when Nat seemed insistent on playing and, when they stood to get back out to the pitch, she wasn't slow to keep a hand on his arm, quite ready to keep him stable if he couldn't keep his feet under him. That she wouldn't be likely to hold him up even if she had a burst of adrenaline to do so was entirely besides the point, she still remained by him until they had mounted their brooms and took into the air. 

Keeping herself to his side, she was already watching for the Quaffle, though frankly it was difficult to do when she kept glancing over at Nat to make sure he was fine. But the match progressed and Nat wasn't falling off his broom and, in short order, she had her head back into the match.