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In 2010, years after his relationship with Simpson ended, Mayer made headlines when he called Simpson "sexual napalm."

"Yeah, that girl is like crack cocaine to me. Sexually it was crazy," Mayer told Playboy in an interview at the time. "That's all I'll say. It was like napalm, sexual napalm."

Reflecting on the "shocking" quote, Simpson says, via People, "He thought that was what I wanted to be called. I was floored and embarrassed that my grandmother was actually gonna read that."

Simpson also adds that Mayer's interview made it "easy" for her to walk away from the relationship. After reading his quotes, she erased the "Your Body Is a Wonderland" singer's number.

In her memoir, Simpson, who is now happily married to former football star Eric Johnson, also opens up about her sobriety and recalls the abuse she suffered as a child. You can read more from Simpson's memoir when Open Book is released on Feb. 4.