Look, you don't have to accept her version of what happened. You only need to accept that that IS her version of what happened. "I understand that's how you feel. You are entitled to your feelings." Don't even offer up your feelings about it--just keep repeating that what you believe isn't important for present purposes. You just want to end this in a kind and fair way with mutual respect.
That might not happen, but hey, it's the best possible outcome.