You continue to amaze me and you are a wonderful father. I feel for your boys, but with your support, I know they will thrive.
in the second grade my daughter's school did a thing called "lunch buddies" once a week they would meet at recess. They were kids of parents of divorce. They talked open and freely about it. It helped my daughter so much. It really helped her to feel like she wasn't the only one and that her struggles with the situation were the same struggles other kids had. Perhaps you can suggest that to the school? it could help your kids and other kids as well.