Dont you wish you could look into the future? There really is no way to predict what may happen and I imagine when Lodo first reconciled with his W that he never knew it would happen again. It is a chance you have to take. You have to have faith that your W has gone through a single hiccup in your marriage and will never faulter again. If she does, then it is time to say adios, but for now, give her the benefit of the doubt that she is sincere.