Kim Porter DID keep diary about Diddy says her ex in bombshell new film...and suspects she died because she was set to 'blow lid off' rap mogul's secrets

Diddy's long-time love Kim Porter DID keep a diary, despite her children's strong denial, her ex and the father of one of her children has revealed.

And rapper Al B. Sure! believes she was about to 'blow the lid off' her lover's perverted sex life.

He even suggests that her 2018 death was suspicious because she had enough material to bring the rap mogul down.

Sure!, 56, makes the claims in an explosive new documentary – Diddy: Making of a Bad Boy –  due to stream on Peacock next week.

DailyMail.com previously revealed what was purported to be the contents of the diary, which allegedly described unsettling episodes of violence and threesomes.

But Porter's children, including Sure!'s son Quincy Brown, 33, denied the book's authenticity in an Instagram post stating it was a 'horrific conspiracy theory'.

Diddy, 55, is currently banged up in the federal Metropolitan Detention Center in Brooklyn, awaiting trial and facing allegations that he ran a decades-long operation that involved recruiting and drugging women for 'Freak Offs' – where they were forced to have sex with other men including male sex workers. 

Diddy, whose real name is Sean Combs, has pleaded not guilty and his lawyers strongly denied the claims.    

The death of Porter has been a source of conspiracy theories for years, as she was a seemingly healthy 47-year-old woman at the time of her death.

A coroner found the cause of death was pneumonia and police did not find anything suspicious – but that has not stopped the speculation.

Porter, a model and actress, was in an on-again, off-again relationship with Diddy from around 1994 until they split in 2007. Together they had a son, Christian 'King' Combs, now 26, and twins Jessie and D'Lila Combs, 18.

While they were together, Diddy also 'adopted' Quincy Brown. 

Sure! acknowledges in the documentary how furious he is at Diddy for stealing Porter from him – even though they were friends who both worked at the hip hop label Uptown Records.

'There's an OG rule, if you're my brother and (between) you and your wife something happens, she's off limits,' he says.

But Diddy, who was dating somebody else at the time, ignored that and one day when Porter was in the studio with baby Quincy, he came up to her and made a strange comment.

'He looked over and saw this really beautiful girl and she was holding this really beautiful baby and he said hey, man, I wish I had a beautiful girl like that,' Sure! reveals.

Diddy allegedly made an 'aggressive' play for Porter and won her over with lavish vacations and a millionaire lifestyle.

Sure! chafes at being portrayed as an 'absent' father and suggested that it was Diddy's publicists who planted the stories against him.

Welling up with tears, he calls the claims 'propaganda' and alleges Diddy didn't even formally adopt Quincy as his own.

'There's no adoption – none,' says Sure!, whose real name is Albert Brown. 'There's no letter to my father. All crafted by a publicist. If you hadn't noticed, his name is still Brown.

'Puffy wasn't too happy about anyone who had a relationship with Kimberly.'

But Porter, according to Sure!, tried to protect him. He said: 'Kimberly said don't get involved, you will get killed.'

'Not only was she trying to save me, she was putting her own life in danger.'

But Porter did keep on talking to Sure!, and they remained friends.

He says in the film: 'She began to confide in me. She said something's not right. His soul (Diddy's) has gone completely dark like he's just not there.

'She made me promise on her son's life not to ever reveal (anything) because she was in complete fear of my life.

'What I do know is that before her death she was keeping a diary. Someone got the passcode to her phone and computer and found out what was writing, what was going on behind closed doors.'

DailyMail.com previously described a 60-page book called 'Kim's Lost Words' which purported to be a collection of Porter's diary.

It allegedly described Combs' colorful love life from the 1990s through Porter's final year – including philandering with both male and female musicians and rappers, and debauched orgies at his home which Porter took part in.

The diary was published in September, six days before Diddy was indicted.

In it, Porter allegedly recounted discovering and making copies of tapes Diddy made of himself having sex with 'young boys' he was managing, including a tape involving an 18-year-old pop star who went on to be a household name.

The final entry of the memoir has Porter falling fatefully ill, dramatically texting her friends 'he got me', and then calling 911.

An attorney for the Combs family, as well as Porter's four children, said the alleged memoir was 'fake' and that 'anyone claiming to have a manuscript is misrepresenting themselves.'

In the documentary, Sure! suggested Porter was murdered and said that she was going to do what Ventura did with her lawsuit - 'Blowing the lid off this entire situation'.

Diddy has consistently denied any involvement in Porter's death.

Singer Sara Rivers, who worked with Diddy on the 2000s MTV series Making the Band 2, was also interviewed in the documentary.

Rivers claims that Diddy once told a member of her group: 'You make me so angry you make me want to eat your flesh'.

To another member of the group he allegedly vowed to 'get a crackhead, pay them $20 to smack the s*** out of you'.

Fighting back tears, Rivers says that she 'didn't want to be around him (Diddy) unless there were cameras' after he sexually assaulted her.

Rivers said that Diddy 'touched me in a place that he shouldn't have, that was inappropriate'.

She said: 'I felt intimidated, I felt oh my god, what the heck happened just now.'

Diddy's childhood friend Tim Patterson, who also worked with him at Uptown Records, says in the film that he believed that a lack of a father figure contributed to Diddy's wayward tendencies.

Marvin Combs was shot dead in 1972 when Diddy was just three years old – the killing is thought to have been related to Marvin's association with a drug kingpin.

Patterson said that the wild parties that Diddy's mother Janice hosted in the home they both lived in was another factor.

He said: 'On weekends, we partied. He was around all types of alcohol, reefer smoke, around lesbians, homosexuals, pimps and pushers.

'People who attended (the parties) were from the streets.

'It wouldn't be a thing to mistakenly walk into one of the bedrooms and you have a couple in there butt naked. This is what we were fed. Was it desensitizing us? I'm sure it was….but that was just Saturday night.'

One of Diddy's former employees - who remained anonymous due to fear of retaliation - claimed that whenever the rapper put red lights on at a party it was the 'frequency for making love and sex'.

At one such party, the employee claimed that Diddy beckoned two girls over, disappeared into a room and didn't emerge for 24 hours.

'For sure they were underage,' the employee claimed.

In a statement to the filmmakers, Diddy's lawyers deny the claim that he abused anyone underage.