In 1981, Stevie Nicks' best friend, Robin, was diagnosed with leukemia. While she was in remission, Robin and her husband, Kim, found out they were expecting a child. Robin's son, Matthew, was born just days before she died. Three months later, Stevie, driven by grief and a desire to raise her friend's child, convinced Robin's husband to marry her. Find out why she now calls this decision "beyond insane."