He did catch the movement, and even in the dark it was clear that she wasn't fine. Where had she been? How long had it been for her?
Then her words hit him, like a punch to the gut. Instinctively, he did turn his body to let her walk past him, but then just found himself frozen to the spot watching after her. Usually, when a woman asked him to leave, he left - but hell, there was usually a reason, he could usually figure out the subtext and be honest with himself. For once, he was oblivious to his own wrongdoing.
"What - why? What's going on?" he asked eventually, genuinely at a loss.