Widow of Hugh Hefner reveals 'five-step seduction method' the Playboy boss would often use

Hugh Hefner's widow has lifted the lid on the couple's sex life before he died.

The Playboy founder passed away on September 27, 2017, and was married to Crystal Hefner at the time - his third wife.

Before Crystal, the 91-year-old business mogul had been married to Millie Williams between 1949 to 1959, and then Kimberley Conrad between 1989 to 2010.

Following his passing, Crystal has shared a series of revelations about Hefner, including that she was never actually 'in love' with him.

She also explained that she 'lost herself' when she was first invited to the Playboy mansion by the multimillionaire in 2008.

"At the time I thought I was on top," Crystal told PEOPLE earlier this year.

"I thought, wow, if I just like everything that he likes and do all the things that he wants me to do, then I'm the favorite. And I was, but I just lost myself in the process."

Now additional excerpts of her book, Only Say Good Things: Surviving Playboy and Finding Myself, have been doing the rounds online where Crystal detailed her sex life with Hefner during their relationship. She described it as 'odd and robotic'.

"This was a well-oiled and well-practiced sequence of events," she penned.

Crystal Hefner was married to Hugh Hefner at the time of his death (@crystalhefner/Instagram)

"One that went the same exact way every time. Picking some girls from the party and bringing them up. Changing into the uniform for the job: silk pyjamas."

Further sharing his apparent five-step regiment, Crystal went on: "The dimming of the lights. The music. The porn. Passing the pot. And then the sex."

While the pair apparently had group sex on the odd occasion, Crystal preferred having one-on-one time with her spouse.

Crystal was Hugh's third and final wife (Samir Hussein/Getty Images)

Crystal's book, which hit shelves in January, was released after the 38-year-old pledged to reveal the 'toxic' truth about life at the infamous Playboy mansion.

Crystal told Daily Mail last year: "Since his passing, I have had to do a lot of self-discovery.

"I have had to find out who I am without it being dictated to me.

"I have had to not only find my voice, but I also had to learn how to use that voice.

"My book is a testament to the power of time, processing all that I have been through and embracing my truth."

Following Hefner's death, Crystal has moved on and is now dating marine biologist James Ward.