“I had an affair and we now live together. It was very passionate. I was the true love he’d been looking for his whole life. Being divorced myself, this was also very thrilling for me. It really was, despite all the secrecy of our relationship, and it was the time when our relationship was at its best. We argue more now than we ever did while we were having an affair. I understand that things would ‘cool down’ but sometimes I think he regrets leaving his wife. Do you think he might have another affair and cheat on me?”

Extra-marital affairs are very seductive. They seduce the participants from their real issues and offer a false sense of belonging. The intensity you describe was probably not the product of authentic love, but of the secrecy and deceit required to maintain the affair. Adrenalin and anxiety combined can feel very much like the kind of love for which you have always longed.

Of course he might regret his divorce. Just as you too have discovered, he may also be reminded that his new domestic set up is not all he believed it would be. Since each of you is capable of cheating, as you have already demonstrated, of course it is possible for each of you to betray each other with someone else.