Sam was well aware that the dock was crawling with scoundrels and didn't doubt at all that Theo could be one. With a sigh he played along for the moment, looking over the three cups and trying to quieten his suspicions.
Narrowing his eyes, Sam thought of something. While he was painfully shy like this, wanted nothing more than to leave...there was something appealing about the distraction of proving this man's game to be fake. "C...Can I lift the cup myself? Then...then ch-check the others?" He held out a hand towards the cups, waiting for the permission.