OP please don’t delude yourself. I’m sure he’d be described as really caring and protective of you too (by his mother). This is not on you, it’s all him. I know this is mentally exhausting but you need to keep your wits about you.
The one friend you told, there is absolutely no way you’ve gone into the level of detail that you’ve shared here. No way would anybody say this is down to stress if they knew the full story.
And him blaming your previous SA on how you feel now is insulting. I mean you have a straw poll here of hundreds of women who are horrified about what’s going on. Sadly DA does happen all the time at every level of society, but that doesn’t mean it’s right or that it has to be tolerated. I would hope that your head is not living in the same era as the nearly 90 year old woman on the AIBU thread, because that story is going to be yours unless you take action.
I assumed you were assured that there was no threat because you had sons, but now I am concerned because there are daughters in the house. You have a man who openly admits he cannot control himself, I suspect uses porn to excess, and at some point he’ll be surrounded by teen girls and their friends. You will be an anxious wreck by that point. You’re already treading on eggshells.
I understand this is overwhelming, so much to comprehend. It must feel like a pile on and you are getting more defensive, probably because he’s been nice for a few days.
This isn’t going to get any better unless you do something very brave. You came to mumsnet because you know it’s not right. You do need to seek help from WA and confide in the other friend who knows you better. I believe that you do have the strength to do this.