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Jessica Simpson Discusses John Mayer's 'Sexual Napalm' Comment, Says He Was 'Obsessed' With Her

Jessica Simpson may forgive, but she doesn't forget.

In her new memoir, Open Book, she gets extremely candid about her relationship with John Mayer, including how she really feels about his "sexual napalm" comment.

The star is officially allowing everything to be in the open with this new book.

Jessica Simpson is spilling all the tea in her new memoir, "Open Book" — including on her past relationships.

Instagram | @jessicasimpson

The 39-year-old singer has been involved in several celebrity romances, including her high-profile marriage to Nick Lachey.

In the memoir, the singer recalled how it was "love at first sight" when she first met Nick.

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"In 1998, when I was 18, I met Nick Lachey of the group 98 Degrees at a Hollywood event," she recalled.

"Hi I’m Nick,’ he said. Hello, my life. I thought."

"Nick loved the fact that I was so strong in my faith and that I had this wide-eyed innocent approach to life."

When he proposed in 2002, I said yes," she wrote.

The young couple even had their own MTV reality TV show called Newlyweds: Nick and Jessica.

Unfortunately, their rising careers eventually caused cracks in their marriage.

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"We had been together almost seven years when I told Nick, ‘I think I want a divorce.’ I later heard that he told the press he was blindsided," Simpson shared.

"I don’t know how. At that point we were not even speaking to each other."

She continued:

"Maybe he was just shocked that I stood up for myself. I don’t think he ever thought I would take the leap."

Despite their nasty divorce, both have gotten remarried.

Instagram | @jessicasimpson

Jessica's been married to retired NFL football player Eric Johnson since 2014. The couple has three kids together.

As for Nick, he's married to television personality, Vanessa Minnillo, and they also have three kids.

Another relationship that Simpson got extremely candid about in her memoir is her "secret" one with John Mayer.

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The celeb first met Simpson in 2005 at a Grammy party.

Mayor was impressed by a song Jessica had written called "With You." He even began to write notes to her.

After her divorce to Nick in late 2005, Jessica dated around, but it was ultimately Mayer who wanted her.

She wrote in her book that Mayer told her “he wanted to have all of me or nothing.”

“He’d walk into a room and pick up his guitar and you’d swoon,” Simpson told "People."

“I didn’t really know the man behind the guitar. And that was my mission."

Apparently, neither would rest until they were with one another.

Well, her mission succeeded since she and Mayer dated secretly for months, even falling deeply in love.

"Again and again, he told me he was obsessed with me, sexually and emotionally,” she wrote.

While she felt powerful around him, she also started to feel insecure around him mentally.

“I constantly worried that I wasn’t smart enough for him,” she shared. “He was so clever and treated conversation like a friendly competition that he had to win.”

Instagram | @johnmayer

She soon became insecure over the little things, like how she came off in texts.

This caused her to have a friend check her texts for correct grammar and spelling before sending them.

“My anxiety would spike and I would pour another drink. It was the start of me relying on alcohol to mask my nerves.”

Instagram | @jessicasimpson

“He loved me in the way that he could and I loved that love for a very long time,” Jessica told People.

“Too long. And I went back and forth with it for a long time. But it did control me.”

Instagram | @johnmayer

She also revealed that it was his "sexual napalm" comment during a 2010 Playboy interview that ended their relationship.

“He thought that was what I wanted to be called,” she said. “I was floored and embarrassed that my grandmother was actually gonna read that.”

“A woman and how they are in bed is not something that is ever talked about,” Simpson added. “It was shocking.”

She continued: “He was the most loyal person on the planet and when I read that he wasn’t, that was it for me,” she said, adding that she "erased his number. He made it easy for me to walk away.”

Instagram | @jessicasimpson

While Jessica and John are no longer in touch, she still appreciates the public apology he made.

“I think he knows a lot of this about me already but he doesn’t know the perspective I have as a woman,” she finished. “That was Jess in her 20s.”

Open Book is set to be released on February 4.