How do you untell something? You can't. You can't put words back in your mouth. What you can do, is spread false gossip ... so people think that everything that's been said is untrue. Include that Stanley is having an affair. It's like the end of Spartacus. I have seen the movie half a dozen times, and I still don't know who the real Spartacus is. And, that is what makes that movie a classic whodunnit.