"Don't it always seem to go that your don't know what you got til it's gone? They'll pave paradise, and put up a parking lot."

Old Joni Mitchell song. Maybe before your time. But the message is still important. People can't see the value of what they have until they lose it. I would encourage you to take the boys and move back to your hometown. That is your best chance for her to see what she's got and if she values it. If not, then you haven't lost anything that you could have kept. Your son is very smart. I hope she can hear the message when it comes from him. My son was the same about us having affairs, but he put it into stronger language. He said he would kill anyone we had sex with. You know, that was very effective language. OW only had to hear it once.