@Checkers88
It's far too soon for him to have had some sort of self-illuminating conversion. He's coming off worse at the moment because of his own actions and he wants to get back to the status quo. Also, as you say, his mother is also aware a little of what's going on.
Already in a very short timeframe you are sounding calmer and more positive- think twice before you throw that away.
Also re-read excerpts from a couple of your posts:
My H has stormed off (or threatened to storm off but not followed through) many times over the years, whether we are out with dc or just us. He did it yesterday on a family walk and even said goodbye to dc etc and I had to try and plead with him not to go.
I think I have ptsd from my childhood where I witnessed some pretty scary stuff from my parents and whenever the threats come up from him, I just can't stop myself pleading.
Do you remember how you felt when you were pleading with him? Do you feel any different now?
Have you considered having some counselling just for you, without him, to work through both this relationship and the trauma you've had in the past?
I do wish you luck and peace OP. I feel you are a strong woman who just needs some space to breathe and spread her wings a bit.
I hope you and DD enjoy your sofa day and the donkeys.🌹