So, what I would like to know is who really believes that an FWS can resolve to never have an affair again because the consequences were so great the first time? Do you think consequences stop people from doing things?

I struggled with this same questions. Especially since plan A seems to be an effort to prove you are a better choice that the OP. It felt like my H was getting off scott free, and it killed me. I wanted him to hurt as much as I did/do.

Anyway, looking at the consequenses to my H, I'd say no, they wouldn't be enough to deter him from another A. I had always told my H that an A would be the end of our M, and he chose one anyway. ENs being filled by another can cause all logic to flee the brain of the party about to engage in an A. Consequences alone will not stop it from happening.