The child of a narcissist is trained to meet the needs of the parent from the day they are born. If the narcissist fathers more than one child, usually one is designated as the "chosen" one, while the other(s) can never do enough to warrant pride, or even love, from the narcissistic parent. Even the "chosen" child is not actually loved by the parent, though the narcissist will do whatever they need to in order to make it appear that the chosen child is loved.
