Keeping Up With The Kardashians family reunion part 2's most SHOCKING ...

The women of Keeping Up With the Kardashians brought their 15-year, 20-season run to a close with Part II of their reunion on Sunday night, where a number of shocking revelations were made.

Kim Kardashian, Khloe Kardashian, Kourtney Kardashian, Kendall Jenner, Kylie Jenner and Kris Jenner were joined by Scott Disick for the special, hosted by Andy Cohen.

Among the biggest revelations were Khloe finally addressing the persistent paternity rumors, Kendall and Kylie talking about 'mourning' their father (in a way) during the transition to Caitlyn and Scott revealing he plans on telling his kids 'everything' about his substance abuse issues and revealing why he's always dating much younger women.

Khloe addresses THOSE paternity rumors 

Ever since the Kardashian family came into prominence, there had been rumors that Khloe was not actually Kim and Kourtney's biological sister.

While she had never addressed these rumors in the past, she admitted to Andy Cohen that they never actually bothered her too much.  

'I've heard that narrative since I've been a baby. That part doesn't hurt me now, because I've been so used to that,' Khloe said.

Kendall and Kylie talk Caitlyn's transition 

Kendall and Kylie were a product of Kris' marriage to Bruce Jenner, who ultimately transitioned to Caitlyn Jenner.

Both Kendall and Kylie revealed the process was tough for them, but they ultimately love Caitlyn and want the best for her.

'I want nothing more than my dad to live out her true self, genuinely, but I mean, it’s a transition,' Kylie revealed. 

'I still have such a good relationship with my dad, I love my dad, but growing up we were super close with my dad. So to mourn that person was hard,' she said.

Kendall added, 'We were big daddy’s girls. So coming out of that, that transition was definitely hard… We just wanted — and want — her to be happy.'

Kris also opened up about her relationship with Caitlyn, which was not in a great place for some time, but she said they are on good terms now.

'I learned a lot along the way. I think I was so naive and uneducated in this whole area,' Kris said.

'I realized that I was not considering what Caitlyn was really feeling at the time, which was that she wanted to be who she is now since the time she was 4 years old… at the end of the day all you can ever want for somebody is just to find their true happiness,' she added.

The Kardashian and Jenner women were joined by Scott Disick, 38, who answered a question from a fan about why he is always dating much younger women, like his current girlfriend, 20-year-old Amelia Gray Hamlin.

'Everybody gets this wrong, that I look for young girls. I don't go out looking for young girls. They happen to be attracted to me, 'cause I look young,' Disick elaborated.

He also opened up about his struggles with substance abuse and his path to sobriety, admitting that he was 'not a good guy' at times when he was drinking.

'It wasn't anything I could hide, you know what I mean? So, eventually, I realized that this obviously is not giving me what I want, and a lot of the things that hurt me in my life were from drinking and these things that I can't really take back,' he said.

'But, you know, now I'm just trying to be the best guy I can be and a good dad and things like that and make up for lost time,' he added.

Cohen noted that Disick's children, Mason, 11, Penelope, 8, and Reign, 6, have started to ask to watch Keeping Up With the Kardashians, with Cohen asking if he's afraid of showing his kids his struggles.

'I'm gonna explain to them everything. I've talked to Mason a little bit about things, but not deeply. I don't think any of them have any idea of, like, the struggles that I've had, but I plan to tell them because I didn't have that growing up,' Scott said.

'And I want to make sure they hear everything, you know, and tell them, like, "You can go this route, but I promise you it's not gonna end up anywhere good,' he added.

Both Kourtney and Scott agreed that they might still be together if Scott had committed to sobriety, and they also both admitted that they have never hooked up after splitting in 2015, despite spending so much time with each other.

The infamous 'Kardashian curse' was also addressed, the notion that men who have dated the Kardashians have seen their lives go downhill after their split, which Kendall is not a fan of.

'What I don't like about the narrative is that the blame is on us. Like, the men need to take that responsibility,' Kendall said.

'I think that we're all extremely giving and caring and loving women, and when there is a man in our lives, we, like, give everything to them. And as a family, we all love them so much, and it's like, almost, like, offensive,' Kendall added

Kylie added that it's offensive because the men are blaming women for their problems and not themselves, while Scott added he doesn't believe there is a curse.

Both Kourtney and Scott gave their blessing to the exes current partners, Travis Barker and Amelia Gray Hamlin.

'I think if you really love somebody, you want them to be happy no matter what. So I do give her a blessing to be happy,' Scott said.

'Whoever would make him happy, I would give my blessing,' Kourtney added.

Kendall also opened up about her current boyfriend, NBA star Devin Booker, revealing she has learned things from watching her sister's relationships that played out very publicly.

'Kylie and I have had the opportunity to watch our older sisters go through marriages and relationships and breakups and all these things, and do them pretty publicly," she said.

Kendall said she learned at a very young age that it would be her 'personal preference' to keep her relationships private.