Day one of 2009... a question

So, here is a hypothetical question I pose to anyone interested in reading. If your spouse of 20 years betrayed you in a very bad way, not just once but many times...how many times would you feel compelled to forgive them before you could walk away and forget them? How would you react if behind your back they started seeing their ex whom they had had a seriously failed relationship with before you, but now suddenly can't live without each other? Not like it's never happened in history before, but say you considered your relationship with this person to be high above such a breach, so the news was quite devasting. What would you do with such a betrayal of trust from the only person you ever loved? Would you cut and run never looking back...or would you forgive them and pretend everything was tolerable even though the decision to do so would change absolutely nothing, aside from stripping you of any dignity you have left...or would your love eventually turn to hatred and total disgust for this person who once meant the world to you?