All four of them had been exhausted and more than a little dirty and battered after their time with the Death Eaters, who hadn't been gentle with them. Some healing charms and rest though, and they were looking better.
Better enough that they were awake and arguing, at least. ". . . no, I wasn't seeing things. I swear, it was him. It was polyjuice or something, It was wearing off, right after you all got off, I turned around first. It was Snape," Harry was insisting as Fleur walked in. "I don't-" Harry cut himself off as she spoke, flushing a little.
He looked over at Fleur. "Ermm, thank you. You didn't have to do that," he told her. Harry trusted Fleur, and Bill. But he was just used to being closemouthed around everyone but Ron and Hermione. And Luna, now.