These are really thought-provoking questions. And none can be answered easily. This is teh very reason why being M is so hard and the D rate is so high.
In my experience, it's a matter of working throug the process - our own internal process. Then finally getting to a point where you know what you must do. In my experience, when I have been conflicted with similar questions (and I have, on many occasions), I would sometimes just be so confused that I would tell myself that I don't have the answer right now. Then I would pray to God for guidance. And - again, in my experience - somehow, someway, the answer would come.
So, I think it's just a matter of each of us working through oru own stuff before we can find the answer.
HOWEVER... I did read once in a book about healing a M after an A, that there are three things that determine the success:
1. That the M couple was at one point in time, in love. 2. That the unfaithful spouse is remorseful 3. [this one I have to try to remember]... I think this one was around both partners recognizing what role they each played in the troubles in the M and taking accountability.
Married 9 years Kids 5 and 6 Bomb 2006 H back and forth for a year M now back on track