Presumably you no longer believe in god. Have you ever spoken to her about evolution? The history of the witnesses? The sort of man Rutherford was, that he left his JW wife and son for over 20 years and neither of them attended his funeral. About the scams...miracle wheat, Beth Sarim, the UN and Mexico Malawi scandals?
I know the usual policy is softly softly, the Socratic method....teach using questions. But I think in your case that ship is sailed. I’m sorry, so very sorry for your kids. I say hit her with everything there is. Every piece of evidence.....if she leaves sod her. She’s not worth it. If you find some one else above ALL else make sure she has the biggest heart. Nothing else matters because those boys need it. Go find them a mother.