May 06, · 20 thoughts on “ Sibling Wars: What to Do When Your Adult Children Fight ” HurtDaughter November 12, at am. I am a daughter that . Sibling rivalry often lingers through adulthood. By Jane Mersky Leder published January 1, - last reviewed on June 9, The new view holds that conflict is not the natural state of sibling.
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.".