I think we say alot of things like i would never put up with that or do that, but yeah unless we are put in the situation i quess we cannot really say how we would react. I think a person with high self worth, and was strong mentally and had alot of life experiences and relationship experiences would not put up with it, but it is amazing what we will do to hold on to the so called "prize", It is like thinking we really want soemone, and we hold on through the hurt and then once we have a it o time to reflect and everything settles down we realsie we cant get over the hurt or forget it, and our desperation made us put up with things that if we were thinking rationally and really listening to our selves we would never have accepted.
But i dont know, i know it breaks your heart to know that someone ypu loves loves another.