KENNEDY SIS CHEERED RFK'S MARILYN TRYSTS!

Last JFK sibling dies with trove of secrets

JEAN KENNEDY SMITH took a shocking secret to her grave — she approved of her brother Bobby’s affair with sex goddess Marilyn Monroe!

An insider tells GLOBE Jean — who was the last surviving sibling of President John F. Kennedy and died at age 92 on June 17 — had intimate knowledge of the famous clan’s scandals.

That’s because her late husband, Stephen Edward Smith, was JFK’s longtime adviser and fix-it man and shared everything with Jean, the source says.

“She was the final keeper of ALL the Kennedy secrets,” a family insider tells GLOBE.

“But Jean never told stories out of school about her brothers. Her lips were sealed!”