Got clear of many things..the techniques taught were good

Got clear of many things..the techniques taught were good. I think the workshop shoukd talk about when one parent is covert narcist , and they show only their good part to kids, make theirself available in comfort zone , so it become normal for kids. They unknowingly customized/manipulated to reach to the other parent for all other need, but same time dont understand the manipulation. Will there be any trauma to them in this situation too?