Narcissistic Personality Disorder, according to the DSMIV, is categorized by "a pervasive pattern of grandiosity, need for admiration, and a lack of empathy." Narcissists are incredibly self centered and can be very manipulative and controlling. They will do nearly anything to get what they want from someone, and since they lack the ability to feel empathy, (defined as "the intellectual identification with or vicarious experiencing of the feelings, thoughts, or attitudes of another"), they can be very hurtful to those around them.
When we talk about domestic violence, commonly defined as one person getting and keeping power of control over another, we are normally referring to direct verbal and physical abuse, but there are many ways in which one person manipulates and controls another without using violence.
The popular reality MTV show, The Hills, shows Heidi Montag and Spencer Pratt (photo below) who are a great example of how a narcissist can be abusive to someone.
Over the course of The Hills, Spencer meets Heidi and they begin dating. Early on in their relationship she catches him cheating on her, but then he wins her back and so begins their relationship. He convinces her that all her friends are terrible people out to get her, and even blames the cheating behavior on Heidi's best friend Lauren. (Remember that a narcissist never believes he or she is at fault - it is always some one else's problem.) Eventually Spencer causes so much drama between Heidi and her friends that Heidi stops having friends all together and moves in with Spencer, at his insistence. Other problems arise as Spencer pushes Heidi to get engaged and then get married. Over the course of their relationship Heidi becomes more and more isolated from her life and even her job, after Spencer says something offensive to her bosses and has her fired. Although Spencer's behavior on the show can be sweet and loving to Heidi, he is ultimately very manipulative and controlling of her.
To watch full episodes of The Hills you can go to this link: http://www.mtv.com/ontv/dyn/the_hills/series.jhtml