Out of curiosity do you think he does really love the OW or is it a fog? Do they ever realise the hurt and stuff they caused or are they just oblivious to it all?
He believes he really loves this woman. Unfortunately that is his current mindset.
He is also in a fog — he’s not seeing the reality of his situation. He’s infatuated w/ her right now. It’s new. It’s exciting. He’s thriving on the drama.
When the OW gets tired of his drama, she may decide to end it completely. Or she may give an ultimatum. Or she may decide to stay with him but get tired of his $ going to alimony &/or child support and look for someone else who doesn’t have those issues.
Where you need to be concerned is his thinking he can live with you & kids and treat you so terribly. I was in your shoes for 6 months of the same drama - much younger OW who kept pushing my H to D me. I heard all the ways I was horrible, mean, not supportive, controlling, no fun etc. So I am very much aware of your day to day life and how horrible it is. I’ve had that exact experience (except my H never left our home).
The only thing you can do is save yourself and stop the onslaught of verbal abuse he is throwing at you.
Get. Him. Out. Of. Your. House.
ASAP!