Mimi Alford is now a 69-year-old grandmother . The author says her affair with Mimi Alford lasted 18 months . `` I 'm not a virgin anymore , '' The White House recounts after first encounter with John F. Kennedy . CNN 's Dominique Dodley contributed to this report . The alleged affair took place in 18 months , according to her book .
Mimi Alford is now a 69-year-old grandmother . The author says her affair with Mimi Alford lasted 18 months . `` I 'm not a virgin anymore , '' The White House recounts after first encounter with John F. Kennedy . The alleged affair took place in 18 months , according to her book .