Just for the record, my wife used this script on me, and she was not having an affair. No going out alone, no emails, she's not on facebook, she does not text, and I had records to her phone. I have said before I wished at the time she was having an affair, because it would make more sense to me if she had been.
We are over 1 year past that awful night now and doing great. I think he is just saying to be careful with blanket assumptions.
