T, This might not be what you want to hear but FWIW I think you should try and take your focus off XH and concentrate on you and the children.
I know it's hard and I know you don't feel you are done yet BUT if God willing your M is restored you are going to need to be the healthy one with a clear mind. Clouding it with what if thoughts about XH isn't going to achieve that. I know you let him be physically but try and do it mentally too. I think it will help you.
Me 43 XH 45 M 2.7.88 Divorce 7.10.09 Kids D20,S17 & D15