This damn scam only works if there are no friends, family, co-workers or any other outside influence.
It's just them, locked into their folie à deux (I'm becoming more and serious about calling it that in more than just a pop culture sense) and their targets. Other people just exist as their marks, as it were.
Every time a third party gets involved it goes wrong.
Like Richard, Bill's mate, who seemed to have only needed to suffer one surreal evening in their company, as it were, to rumble them, or Bill's wife, who had them sussed from the start, or Ros Hemmings...
I'm quite surprised that in all the dealings with neurologists over the years, there has been no mention of seeing any kind of mental health person. Maybe there has. I don't think they'd be keen on that kind of thing though.