Former Playboy Bunny Holly Madison recently wrote what is now the biggest selling non-fiction book in the U.S. all about her time in the Playboy Mansion and her relationship with Hug Hefner. Now, one of her former housemates, Izabella St. James, has revealed that a lot of what Madison wrote in her memoir is a lie and that it was more of an obsession with Hefner than it was a relationship.

The 39-year-old Polish beauty believes Madison extended the truth a lot in her memoir simply for the purpose of selling more copies. St. James insisted in an exclusive interview with the Daily Mail that Madison is out to get "revenge" on Hefner for never marrying her, when she was really a "weirdo" and an "outsider" in the mansion. She had this bizarre "single white female" obsession with Hefner and would happily take part in sexual acts with him knowing that none of the other girls would do it.

"She is selling the book by making outrageous claims," St. James said of Madison, claiming she was suicidal. "And doing tell-all interviews where she says he degraded her and calls it the house of horrors. If it was the house of horrors, she was the most willing and happy participant of all."

She then went on to explain that Madison was completely delusional and would make herself up to look like Marilyn Monroe to win over Hefner.

"When you want something so badly, lose all dignity and cross all moral boundaries to get it and then turn it around to make yourself a victim," she continued to say. "And maybe she has made herself believe this, but I feel sorry for Hef that she is just so completely ungrateful. She throws him under the bus without giving him any credit. It is almost disrespectful and mind blowing to be so delusional."

In the memoir, Madison claims that she was put down by Hefner and manipulated and forced into that lifestyle. This completely angers St. James because of the way Madison is making herself seem like a victim.

"She does not take any responsibility for her choices or actions. Instead, she chooses to vilify Hef, vilify former boyfriend Criss Angel, vilify the friends she never made and the girls who didn't like her," she continued to say. "It is a way for her to justify the things she did to get where she is today, because Holly did some really nasty things. Holly chose to just completely lie and omit that she was absolutely, completely obsessed with Hugh."

She explained that Madison's obsession started to get out of control. Eventually she was eating like Hefner, dressing like him and starting to do everything he did. All of the girls in the house knew how bizarre the entire thing was, but Madison was so deep in her obsession, that she would do anything to please him.

St. James even tweeted about Madison's memoir when it first was getting recognition. "Oh my. From the Queen of Backstabbing and Betrayal. This ought to be good! #Fiction #TheTruthWillSetYouFree," she wrote. She even answered one fan's question, who asked if the story was "BS," by saying, "Yes, many aspects of Holly's story are BS. She is no victim, she's the one who left many victims behind."

Even Hefner sort of feels the same way about Madison's book being a way to bring attention to herself. "Sadly, there are a few who have chosen to rewrite history in an attempt to stay in the spotlight," he recently told Us Weekly. "I guess, as the old saying goes: You can't win 'em all!"

See St. James' social media reactions to Madison's book below and read the full interview HERE!