I say that by experience my self. Went through it also. Best thing I did was walk away . First few months really sucked but within 6 months I was glad . Happier than I ever thought. That said I did not have kids involved. That would have changed things alot. Being to walk away from her would also ben in some way walking away from them. There is no way. I would have let her force me out of my kids daily lifes. If thats the case stay. If she doe’s it again or continues. I think I would make it clear very clear . Your not going to leave your kids. But any relationship with her is over. She will eventually leave . But you will keep the most important thing. At this point the kids are more important than any thing else. Be a great father. Do Not fight argue with her in front of your kids. Love them with all your heart. Once you raised great kids . They are on there own. The things you want in your life you can get. At least one parent has to do the rite thing. If she has betrayed the family. ( not just you) . You can put hope in her seeing the light. I wouldn’t put trust in it at all. Your responsibility is the lifes you brought into the world . Put you effort into being father of the century.