With the mood I am in right now, I am sure I wouldn't phrase it right. I would say that as long as you are still married you have serious issues with him bringing the kids in contact with OW. You ask that he respect your wishes unless he wants to pay for you to bring this issue up with your L.
Problem sounds meaner but meaner can be good.
kat
Me-53(and learning!) S24, S21, D18, D17 Just keep swimming, Just keep swimming. Dory