I’m truly sorry for you and the situation you’re going through, I know it’s hard to live with someone who’s a narcissist for sure…I worked with a lady who is a narcissist and I had no idea what to do about having a working relationship so I started researching everything I could find out about people like her, it’s definitely not easy, she is also married with two daughters and I felt bad for her family, there’s nothing you can do about this situation because they don’t change and worst of all they don’t care what you think. I know that her husband controls the household and took most of the responsibility for the girls, he’s a great guy and stayed with her because he felt obligated to do so for the sake of his family. I think that if you’re having trouble coping then I would suggest trying therapy, if she doesn’t want to go then you should do it for yourself and your children, it will help you a lot to understand how to deal with this and most importantly the children will understand more and find ways to cope with this situation, best wishes.