I believe it's all based on how much damage your WS causes. Initially after finding out the A, I was willing to forgive and work on the MR. But my W has shown zero remorse and continues to sneak around. And has even looked of other men due to the fact that OM doesn't live in the state.
So we're expected to wait out tolerance, while W does her wild oats. And we sit here just waiting patiently? At this point, I wouldn't want anything to do with my W relationship wise. Maybe meet up for sex to be honest and that would be far and between. To be honest my MR vows is what is probably keeping around and love for who she was.
Limerance passes and your left with someone you now have zero respect for, other than sharing a child. So the WS would have to do so much to make themselves look worth it. And to be honest, if I am with someone else. Why would I leave a good woman to entertain a former WW?