A complex relationship existed between Lee Radziwill, Jackie Kennedy, and Aristotle Onassis, contributing to a long-standing rivalry between the sisters. Onassis’s romantic involvement with both women is central to understanding the dynamic. The affair reportedly created tension and competition between Jackie Kennedy and Lee Radziwill. Details suggest the relationship played a significant role in exacerbating existing familial strains. Sources indicate the love triangle was a key factor in the sisters’ often-difficult relationship. The story sheds light on the personal lives of prominent figures and the impact of wealth and power on interpersonal connections.