Sean “Diddy” Combs is exposed by his late ex-girlfriend Kim Porter in a new memoir. (PHOTO: Getty Images/Gallo Images)

Music mogul Sean “Diddy” Combs, who was arrested this week on sex trafficking charges, is also the subject of an autobiography in which he claims he had sex with a famous male teen pop star, hosted sex parties with an A-list actor and his wife, and assaulted his ex-girlfriend Kim Porter.

His memoir, a slim 60-page book based on Kim's diary entries, describes orgies hosted and attended by Diddy (now 54), his sexual relationships with male and female musicians, and claims he filmed himself having sex with “young boys” whose careers he managed.

Kim was 47 when she died and has three children with the mogul – son Christian (26) and twin daughters D'Lila and Jessie (17).

The memoir “Kim's Lost Words,” published a few days before Diddy's arrest, was ghostwritten by publisher Chris Todd under the pseudonym Jamal T. Millwood.

Kim's diary entries were stored on a USB stick given to him by a celebrity friend, Chris told the Daily Mail.

“I know the celebrity source pretty well. I know how close they were to Kim and Diddy and all the people in the hip-hop community.”

Chris said he used a pseudonym because he feared for his life, but now that Diddy is in custody, he feels safer talking about the book.

Diddy and six of his seven children – (from left) Justin, Christian, Quincy, D'Lila, Chance and Jessie – at the 2020 Pre-Grammy Gala. (PHOTO: Gallo Images/Getty Images)

ORGIES

According to Kim's book, Diddy hosted orgies disguised as extravagant parties.

“Not only did we have threesomes, we also swapped partners. Our sex life was crazy, but I was able to do things with Sean that I could never have done with a straight man,” she wrote.

She talks about the night she surprised Diddy as he was coming out of the bedroom with a “chart-topping rapper” – and the woman's husband.

“I was grateful I wasn't asked to come into that room,” she wrote, as she “didn't really like” the rapper.

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The rap mogul's New York home was searched earlier this year. (PHOTO: Getty Images/Gallo Images)

Allegations of abuse

Diddy has been accused of assault on several occasions. At the beginning of the year, a video surfaced showing him attacking his ex-girlfriend Cassie Ventura (now 38) in a hotel in Los Angeles.

In Kim's memoir, Diddy is described as a “terrifying monster” who also abused her during their 13-year relationship.

The memoir says he hit her for the first time after she refused to use a strap-on toy on him.

“Then Sean hit me. It was the first time, but he hit me hard. Before I could form words, he started begging, 'I… I'm sorry.'

“I held my cheek where he had hit me, turned around and ran away. That should have been it. But I guess I'm a masochist.”

Kim died of pneumonia in 2018. (PHOTO: Getty Images/Gallo Images)

SEX TAPE

Diddy allegedly recorded his “marathon” sex sessions with teenagers and male sex workers, Kim wrote.

“Some of the tapes contained things I never expected; the gay parties are one thing, but the young guys, like (two hip-hop stars managed by Diddy) and (the then-18-year-old pop star)?! I never would have known that.”

She reportedly made copies of the tapes for her own protection as part of her plan to leave Diddy.

Chris told the Daily Mail that he had been given access to the sex videos.

“I know for a fact that (Diddy's sex tape with the teen pop star) was sold to Hollywood studios by other parties,” he said.

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Kim with her twin daughters Jessie and D'Lila in 2016. (PHOTO: Getty Images/Gallo Images)

Meanwhile, Diddy, who pleaded not guilty, was denied bail and is being held at the Metropolitan Detention Center in New York City, where R. Kelly and the late pedophile Jeffrey Epstein were also incarcerated.

No trial date has been set for Diddy. His lawyers plan to appeal the denial of his bail.

SOURCES: DAILYMAIL.CO.UK, PEOPLE.COM, ABC.COM, MIRROR.CO.UK