I for one don't wish that bubble to burst for my ex. I wish her well. I'm pretty sure she won't have any troubles except with the kids and her relationship with them. There's scarring there.
I think to add to K's post, the justification comes with the selfishness. The "what about me" concept. Once started, they have to finish that train of thought and it leaves no room for anyone else. They'll just have to adjust and move on. They'll be "ok" since so many others do it too In some ways they are right if you overlook a few things such as the emotional scars the kids get left with, the emotional destruction, the blended families, the divided families, and so on...
AJ
"Our lives begin to end the day we become silent about things that matter" MLK Put the glass down... "Yesterday I was clever so I wanted to change the world Today I am wise, so I am changing myself."