T, my heart hurts when I read your posts. You are a strong woman even if you feel lost and extremely weak right now, you have an incredible strength in yourself.
An affair EA or PA is an affair, it has the same devastating effects, we are being replaced in their mind and heart and become the villain. Protecting yourself legally is a MUST, they don't care about anybody else than themselves.
Focus on the kids and yourself, he is in full MLC, it means he is totally focused on himself and doesn't care about anybody else and when you see a glimpse of caring, don't be fooled. most of the time it's just to look good as a father/husband to others, they liked to be in control of the situation, their move are usually calculated to their best interests only.
Don't expect anything from him, build a new life where he is not part of it anymore, because he might come back but he might not, but at least you won't have wasted your time waiting for him and put your life in hold. You are the only sane and reliable parent left for your kids, don't expect him to have an epiphany soon, he is totally into his OWN needs, look around, is he acting as a father right now? NO, he is acting as a guy who is placing his needs first, and won't mind cutting his family financially just to punish his wife without thinking it might have an impact on his own children. There is a name for that kind of person: j..k
Surround yourself with good friends, accept help from the people who love you, don't count on him anymore and start looking at the light at the end of the tunnel (see that strong independent woman with a successful career and 3 gorgeous kids) , have fun, laugh..
(((hugs)))
Me 52+ WH 57+ Married 20 + Piecing since 2016 (ready to give up...)