Well, this is the way it works. Before they take the registration, they call both of you and ask if you are willing to go to the weekend with an open mind and a willing heart. If the answer from both of you is yes, then they ask if there is a third party involved. It's a yes or no question. If you say no, they take your reservation. If you say yes, then they tell that person that he/she has to end the relationship with that person first.
I thought for sure that my H would give the wrong answers to both questions. But when the call came, we happened to both be standing in the kitchen and I heard him say yes to the first question and no to the second. So we went.
But he had not really ended it with OW before we went. I found emails later where he had told her that we were going, and he would see how it went, and would be back in touch with her. And she, being a family therapist by training, told him that sometimes you feel close for a while, but then it goes away!
Well, we went to the weekend and we had a big reconciliation. And it's 3 years later, and it hasn't worn off yet!
I confronted him with those emails sometime during the Post sessions, and he finally did tell her that she needed to find someone else. He was staying with his wife.