A parent with Borderline Personality or Narcissistic Personality Disorder can vent their own frustrations, aggression and hatred against one child by uniting the others who are made to think that this one sibling is guilty of everything. In this scenario, the parent goads the other children to pick on the one. None of this stops in adulthood. Of course, the child whose personality is most like the personality disordered patient is targeted because that parent sees in the child everything they hate about themselves. Here, too, this pattern continues into adulthood.