The answer is. They cant ask the question of someone else, only answer it themselves. Totally depends on that couple and their relationship, history weighed against the circumstances of the affair. Affairs can destroy entire families on both sides and the effects can be felt forever. Given they were newly married, if it were me I would not try to build a life on that foundation. It does not bode well. Wait until times get hard and you get cancer or worse. Will they be there for you? Sad, but things could be worse, there could be children counting on your marriage. Thankfully there are not. The marriages I have seen return from the brink had too much to loose. History, children etc.