They are the full blooded vampire parents of Alexander Sterling and Athena Sterling.Constance is an wealthy Romanian art dealer and the son of Alexander's beloved grandmother. He doesn't know his son's talent in paintings which causes conflict in their relationship.Cassandra is a vampiric role model to Raven in the books as Raven wants to grow up to be just like her. She and Raven bond when she and Raven go shopping for purses in Dullsville.She and Constance have a romantic and loving bond they met as teenagers in a graveyard and have been together ever sense.