She doesn't want to lose her kids. They are the world to her as they are to me.
Second only to the relationship with OW. Her relationship with the kids has suffered as a result of what she's doing.
I think you are doing the right thing in defending yourself and your kids. None of this means your marriage is dead and buried, just that your are trying to preserve something to come back to.
You cannot be lonely if you like the person you're alone with. Dr. Wayne Dyer