River was so far from being a police officer. In fact, she tended to be the one getting arrested instead of actually doing the arresting. But that was beside the point. What she did have was a presence that demanded attention. She couldn't help it, she just attracted attention wherever she went. Though she did have a flair for the dramatic, especially if the Doctor was involved.
"Oh, I know a great little place just down the road, if you don't mind the company?" She smiled, then noted the confession of him just getting into town and paired it with the rumpled clothing. "Just got here? Was it suddenly or planned?" Which was basically River's subtle way of asking if he'd suddenly shown up here like she had. In which case she'd promptly explain everything. And hope that he wasn't one of the ones who would freak out upon learning of this. But for the moment, he seemed perfectly calm, which was a good start. River wasn't exactly sure how she'd handle the situation if he started freaking out or being dramatic.