I am so sorry that you are going thru this. Keep your chin up and know that this is his issue and not anything that you deserve.
I don't know what happens to these guys...but to me she sounds live a very evil woman. Very much like the one that broke up my first marriage. Guess what. He never married her and regrets his actions now.
That may be small comfort to you at the moment, but don't let them steal your dignity. Take the higher road and care for yourself and your children. Do not let yourself be dragged down into her low level.
Take care.
Most of us are about as happy as we make up our minds to be.
