Dec 18, · Sibling rivalry traces its roots back to early childhood when siblings compete with each other for their parents' love and attention. Although it is common to feel threatened by this competition in childhood, it often continues unresolved into adulthood, according to Elizabeth Bernstein, author of "Sibling Rivalry Grows Up.". Jan 14, · Why are fights with adult siblings so brutal? It starts at Day One. Only your sibling has known you forever. Only your sibling knows your triggers.
20 thoughts on “ Sibling Wars: What to Do When Your Adult Children Fight ” HurtDaughter November 12, at am. I am a daughter that is searching for answers on what a parent’s role Estimated Reading Time: 3 mins. While people often think of sibling rivalry as a childhood phenomenon, adult sibling rivalry is a common phenomenon in which adult siblings struggle to get along, argue, or Estimated Reading Time: 7 mins.