Scott Disick
Scott Disick and Kourtney KardashianInstagram/Scott Disick

Recent reports suggest Kourtney Kardashian's partner Scott Disick has had sexual relations with her sisters Khloe and Kylie Jenner.

During an episode of "Kourtney and Khloé Take the Hamptons", a spinoff of "Keeping Up With The Kardashians", Disick hooked up with Khloe after Kourtney kicked him out of her room. "The two were even filmed crossing the line in the show," revealed In Touch (via Hollywood Life).

Scott's affair with Khloe Kardashian is no secret, but what's shocking is that she is not the only one our man has had his eyes on. According to the reports, Scott also hooked up with Kourtney's 17-year-old stepsister Kylie as well.

"Scott says over New Year's, he also slept with Kourtney's younger sister, Kylie. He spilled the beans to a buddy over Super Bowl weekend," the insider claimed.

But Kourtney learnt about it only after Kim got involved. At one point, no one was talking to each other anymore.

"'I can't believe you slept with my sisters!' she allegedly yelled, scaring the crap out of him. There were lots of tears, then Kourtney stormed off to their bedroom, locking the door behind her. Scott knew he was caught," the source said.

Now, Kourtney doesn't know if she will be able to trust her sisters again. "She will never forgive her sisters completely. Khloé was her best friend, so Kourtney might not talk to her for years," an insider said.

And all this comes just a month after reports about Disick getting Kendall Jenner pregnant had surfaced. Apparently, Disick had even proposed Kendall, but she turned him down.

It doesn't look like Kourtney is in any mood to forgive her sisters for sleeping with the father of her three children.

More Kardashian-Jenner drama may unfold on "Keeping Up With the Kardashians" on E!, on Sundays at 9 pm.