All the questions asked on the show were already asked earlier while plugged into the polygraph, so you'd think that if the person was being asked questions he doesn't want others to know about, they wouldn't go ahead with the show part. The first person on last nights show had a heap of questions he wouldn't have wanted his wife to know about, but still went ahead with the show. In the end, he didn't win any money, but would have revealed enough about his wife to have her leave him. With no guarantee of winning any money, it isn't worth risking a relationship over it.