FWIW, after doing a quick scan through the forum post, I could be convinced that Robbi and RIP where using signals to coordinate hands. There did appear to be a fair bit of subtle communication between the two throughout the game.
Of course, if the only cheating they were doing was signaling between each other (i.e. no fancy electronic gadgets), then they would not have had an advantage on the J4 hand. So it is possible that that hand was just plain luck. But because the session was being recorded, and because they were signaling, they decided to give the money back on that hand to try and ward off any accusations.
Of course, if the only cheating they were doing was signaling between each other (i.e. no fancy electronic gadgets), then they would not have had an advantage on the J4 hand. So it is possible that that hand was just plain luck. But because the session was being recorded, and because they were signaling, they decided to give the money back on that hand to try and ward off any accusations.