You're so much better equipped to handle it at this point.
This is exactly what doing the work here does for us. In my opinion. I never had actual proof of WW affair until my kids went out to be with mom. Even then she tried the "he is just a friend and I thought S7 and his daughter could play together". I actually laughed on the phone when she said that. My response was very calmly"There is no reason to lie to me anymore. I am not dumb. He is welcome to have you. I wish you both luck, but our kids should not be exposed to him and also your lies".
Bt, by doing the work here, you are in a much better frame of mind to handle this. I would have exposed the affair back before I came here and you would have also. When we are hurt like that we act out in anger. I still struggle with this some, but I am getting better. We have to trust the process. Talking to a lawyer would be a good step. Telling him that " I will not be lied to and disrespected anymore. If you want to be with this woman, please pack your things and move out. I don't have time for liers and cheaters in my life."
Me:44 EXW 44 Wonderful Children M11, T14 BD 6/14 OM Confirmed Divorce Final 2/25/16 "It works if you work it!"