Dialectical Behaviour Training, created by Dr. Marsha Linehan and originally for those with Borderline Personality has since been applied very successfully for to loved ones of those with BPD as well as those with NPD and their loved ones. DBT
Adult children of those diagnosed with Borderline Personality Disorder often struggle with many aspects of the relationship (or lack thereof) with the parent that has BPD. Responses of adult-children with a parent with Borderline Personality Disorder to questions from A.J. Mahari about ending the relationship with the borderline parent.