I know of a number of cases, especially during custody disputes when the narcissistic husband (or wife) turns sadistic and gains pleasure and narcissistic supplies by threatening to take your children away from you. In some instances he succeeds because he has the financial resources and the charm and persuasiveness to persuade mediators and judges that he is the better parent. This man or woman doesn't give a damn about the welfare of his children. He is out for revenge because he gets pleasure from watching you suffer. That is the definition of a sadist. He is seen as the "good father". He spreads lies about you and may even turn your family members against you.
Arm yourself with as much information as you can about the narcissistic personality. You cannot know enough. Make sure that you have a very savvy attorney who can go up against the narcissist. He will have hired a barracuda of a lawyer who is out for blood.
If you know early that your spouse is a narcissist you may want to end the marriage there before you have children. Being married is one thing---having children is another. Having children with a sadistic narcissist is putting the welfare of your children in jeopardy. If this has already happened, take heart and go into battle fully armed, knowing that you are going to win.Take good care of yourself as well.Form a close knit support group.You can do this. To learn about the narcissistic personality in-depth, visit my website:thenarcissistinyourlife.com
Linda Martinez-Lewi, Ph.D.
Telephone Consultation: United States and International
Book: Freeing Yourself from the Narcissist in Your Life