@FourAndFive you are presenting yourself as so strong and I have no doubt you are and have had to be in this horrendous situation.
He is treating you and everything you have together so disrespectfully and cruelly. Yes, it is cruelty.
Is it possible he's early dementia/vascular or otherwise? Taking a substance that's affecting his mindset? It's so bizarre his needed attachment to this woman that he point blank will not stop contact with her.
At this point I'm inclined to think he's gone from you.
As admirably as you have handled this, let him go. He's not even condescendingly acknowledging how badly he's behaving or saying he will stop.
Don't allow yourself to be a crutch for him. You will never familiarly recognise him as the man you knew and loved. He has wronged you and your whole life together and continues to do so.
I'm in absolute wonder at the "hobby" and her family's compliance in all of this.
If she were my daughter, I'd be worried about obsessive/attachment from an older married man.
Is she / her family aware of CS threat he made simply because you requested he cut contact with her.
Bizarre behaviour.
Stay strong @FourAndFive all best wishes x