This was certainly something. Because she was a 'prisoner' River kept as quiet as she could, but she was smirking. Oh yes. And she might have winked at her Doctor.
The guard who had been watching over them turned to Rory and eyed him a bit. "I don't recall ever seeing you here before. Who are these two?" he asked in a gruff voice.
As he waited for Rory to answer, the guard went to check which cell to place them in. Perhaps this was a good time to over take him? If they were going that route anyway.