My abusive F was a narc. I've only seen it in the last few years. He was so controlling, especially where money was concerned, he hated anyone disagreeing with him and he was paranoid. He always thought my DM was being unfaithful to him; he refused to allow her to go to a work conference away one weekend when we were small, saying that he knew what went on during those weekends away. (Apparently a woman's adultery was worse than a man's adultery and he was certainly not faithful to her, possibly SA towards his DDs didn't count??)
He took no notice of how she felt, made us all go to Saudi Arabia when I was three, DM hated it, as she had 3 children of 5 and under and had no freedom. More trivial but typical of him, he got himself a dog that she was adamant she didn't want, and of course she did all the work looking after the said dog.
I always thought he mellowed as his health deteriorated (he had Parkinson's Disease), but looking back it didn't, he just found other ways to manipulate us all. DM showed me some of his letters to her when she was away for a couple of months working in Africa. They were so full of emotional blackmail that it was sickening. (He was very well cared for.)
He was similarly emotionally abusive towards DSis and me.
At the end, when he was very ill in hospital, I remember willing him to die so that we would be free. This screwed me up afterwards as I was crippled with guilt, but looking back it did set us free. My DM has since managed to get a PhD in her 70s and spends 3 months every winter in Africa. She and my F worked there in their early years, as missionaries and she always wanted to go back to it.
My DM is controlling towards us, too, but more in a codependent way; she always feels that she is the one who needs to make things better and when they go wrong it's somehow her fault. (Especially now that she knows about the SA.)
If you'd asked me a few years ago, I would have said yes, everyone can change, but I think that very few people do, and my F certainly didn't. I don't ever remember him admitting to being wrong, whereas my DM keeps blaming herself for everything.