" Having a narcissistic parent is an early manifestation of a phenomenon termed by some as “co-narcissism.” Alan Rappoport describes this as unconsciously adapting to and supporting the narcissistic patterns of another person. He argues that this pattern starts in childhood, with the child having to adjust and calibrate to the narcissistic parent.
Narcissistic parents are not tuned into their children, and the narcissistic parent largely views the child as an object with which to satisfy his or her needs. Narcissistic parents will be overly indulgent and intrusive about some things and detached and uninterested in others. Children in these situations often believe life is unpredictable and strive hard to please “unpleasable” and distracted parents. If you grow up like this, you learn that you are valued for what you did, but only if it was aligned with your parent’s wants and needs. It can be a confusing way to grow up and also the perfect set-up for accepting narcissistic behavior as “normal” and then tolerating it from a partner or in other close relationships. "

― Ramani Durvasula , Should I Stay or Should I Go?: Surviving a Relationship with a Narcissist