Jackie Kennedy and Marilyn Monroe traveled in similar circles. They shared the same hairdresser and, at different times, the same therapist. However, due to their difficult relationship, they didn't welcome these shared associations. Jackie's husband, John F. Kennedy, reportedly had numerous affairs during their marriage, and Monroe was supposed to be one of these mistresses. In his book "These Few Precious Days," Christopher Andersen claims that Jackie worried that Monroe "would obliterate her husband's reputation, destroy her marriage and hold her up to public ridicule" (via CBS News). Given this concern, it's likely Jackie would have dreaded any contact she had with Monroe.