His exhale was shaky, relieved, his fingers curling slightly into her hair, but that relief was tainted by the dropping in his gut at her words, by the wide, scared look in her gaze. He looked away, looked over her huddled form as if it could give him a clue as to what was wrong. But as his eyes locked with hers again, he knew it wasn't anything he could see, not really. "What can't you stop, sweetheart?" he murmured.