Kourtney Kardashian, Scott Disick split: Disick brags about sleeping with Khloe Kardashian, Kylie Jenner while in rehab [RUMORS]

Scott Disick reportedly confessed in rehab that he slept with his ex's sisters, Khloe Kardashian and Kylie Jenner.

Disick apparently checked into rehab for alcohol and drug addiction after the events of Lamar Odom's overdose. Celebrity Laundry reports that the TV personality confessed to sleeping with Kylie Jenner and Khloe Kardashian, according to Life & Style Magazine.

The site reports that Disick apparently had intercourse with Khloe in 2014 in a Hamptons Hotel and with Kylie Jenner in 2015 in early 2015 whilst the two are drunk. His rehab sponsor apparently told him that he must tell his ex, Kourtney about sleeping with two of her sisters.

"For his treatment to be successful, Scott has to confess all betrayals. Scott needs to tell Kourtney everything, it's the only way for him to move on. Scott's sponsors want him to come clean," an insider for the magazine reportedly say.

According to Hollywood Life, Kourtney was reportedly in tears when he heard his ex's confession.

"Scott sat Kourtney down and confessed to all of his bad behavior, from the years of cheating to the drug-fueled sex parties," an insider told Life & Style magazine. "She was shocked to finally hear about things she's suspected for years. She was teary-eyed."

However, a report by Inquisitr debunks the rumors and says that it is "nonsense."

According to the site, Disick is still in rehab but he is allowed to use his cellphone which is why the reality TV star can still post on his Instagram.

An insider states that he is using his time in the rehab to evaluate his life and cutting his connections to those who do no good by him.

"Scott has made an effort to cut bad influences out of his life. He knows a lot of people were using him," the insider said. "At the time, he didn't really care because he was caught up in all the partying, but he's finally realized the party has to stop. He's focusing on a tighter, more loyal circle of friends - the people who were there for him before all the money and fame."

Apparently, Disick's checking into rehab was mandated by "momager" Kris Jenner. She threatened to take away his access to his children if he did not get help, Radar Online reports.

"If Scott messes up one more time there is absolutely no chance at any sort of reconciliation," an insider allegedly told the gossip site. "Kourtney will get full custody of those kids and she will also do everything that she can to prevent him from even seeing them without her being present."