Article continues below advertisementRobert F. Kennedy Jr. reportedly confessed to struggling with "lust demons" as his s-- life with late second wife Mary Richardson Kennedy dwindled. The Health and Human Services secretary, 72, detailed the situation in secret diaries taken by Mary - who tragically committed suicide in 2012 at age 52 - as "insurance" amid their contentious divorce proceedings."I've been given everything that any person could wish for: A beautiful wife and kids and loving family, wealth, education and good health and job I love," Robert wrote in one 2001 entry.