In a story to air on Rock Center this Wednesday, Mimi Alford, then Mimi Beardsley, was a 19 year girl from a well to do New Jersey family who was interning at the White House.

Her first encounter with the 45 year old president was in a White House swimming pool. MS. Alford then says the president took her to his room where she lost her virginity to him. In an article on the Slatest Ms. Alford says the president asked her to perform oral sex on an aide as Kennedy watched.

In her new book "Once Upon A Secret", Mimi talks about her more than 18 month relationship with President Kennedy and the rumors that circulated about his exploits with many women.  In her interview with Meredith Vieira, she says she did not wake up wanting to write this book, she felt she had to".

You can watch the entire interview on NBC's Rock Center  tonight.