A new memoir published by former White House intern Mimi Alford, then known as Marion Beardsley, claims President John F. Kennedy had an affair with her for 18 months while she was a teenager. The book, Once Upon a Secret: My Affair with President John F. Kennedy and Its Aftermath, alleges the JFK affair began with a personal, private tour of wife Jackie Kennedy‘s bedroom.

Mimi Alford, who is now a 69-year-old grandmother, claims in the book that the JFK affair began when she was a 19-year-old White House intern. In Once Upon a Secret, Alford says that she met was invited by the president’s “first friend” Dave Powers to an after-work party at the White House. After consuming several drinks, Alford was invited on a personal tour by President John. F. Kennedy. The tour ended up in First Lady Jackie Kennedy’s bedroom.

“I noticed he was moving closer and closer,” Alford writes in her memoir. “I could feel his breath on my neck. He put his hand on my shoulder.” Alford’s description of her first alleged sexual encounter with JFK is fairly steamy.

â€œSlowly, he unbuttoned the top of my shirtdress and touched my breasts.

â€œThen he reached up between my legs and started to pull off my underwear. Â â€œI finished unbuttoning my shirtdress and let it fall off my shoulders.â€

Alford said she lost her virginity to John F. Kennedy that dayÂ in his wife Jackie Kennedy’s bedroom. “After he finished, he hitched up his pants and smiled at me,” while pointing her to the bathroom. “I was in shock,” she writes. “He, on the other hand was matter-of-fact, and acted as if what had happened was the most natural thing in the world.” Kennedy allegedly asked her if she was hungry and called a car to pick her up and take her home.

According to Mimi Alford, the JFK affair lasted for 18 months, although they never revisited his wife’s bedroom. She always called him “Mr. President” and says they never kissed when they made love. Alford said she never felt guilty about the affair. Alford also claims that President Kennedy once asked her in a dare to give oral sex to his friend Dave Powers and she complied, while JFK watched. Alford claims Kennedy later apologized to both of them over the incident.

Alford says she last saw Kennedy shortly before she was about to be married to her college sweetheart, Tony Fahnestock.Â Alford and JFKÂ allegedly metÂ briefly in a hotel in Manhattan just seven days before he was assassinated. She claims he told her he was sad she would not going be going to Texas with him and that he would call her when he got back, despite knowing she was about to be married.