We had some new friends we had started to hang out with. He was ex-LAPD, she was the classic abused wife. He would say such hateful things to her in front of us.
One day I told him if he couldn't be kind to the mother of his children in our presence, he was no longer welcomed in our home. (I swear that is what I said).
We are no longer friends with this couple.
You forgot "Respect yourself and don't settle for being treated with disrespect."
If the woman in your example respected him and respected herself she would never tolerate the life she's living.