The Jenner-Kardashian clan has been hit with another cheating scandal.

Sources tell TMZ that Kylie Jenner and Travis Scott's relationship is on the rocks after the 21-year-old makeup mogul came across proof of Travis' infidelity. The outlet did not provide any information about the so-called "evidence," but Kylie reportedly discovered it Wednesday, after Travis flew to Los Angeles to surprise her and their daughter, Stormi.

Per TMZ: "They were at her home in the evening, when she claimed to discover 'evidence' he cheated on her. A major argument erupted and continued into Thursday."

This reported drama is said be the real reason behind the ASTROWORLD Tour shakeup. Hours before he was scheduled to take the stage in Buffalo, New York, Travis announced he was postponing his show to recover from an illness. But sources said the rapper actually rescheduled the show so he could stay in L.A. and deal with the situation. 

Travis' camp said he categorically denies cheating on the mother of his child. Kylie has yet to publicly address the reports, and her recent social media activity gives no indication that there's trouble in paradise. Her last Instagram Stories were promotions for Kylie Cosmetics products.

We'll be sure to keep you posted as the story develops. 

This is the second relationship scandal Kylie has had to face this month. It was a little over a week ago when Khloé Kardashian and Tristan Thompson's split began making headlines. Khloé reportedly broke up with the NBA star because he allegedly cheated on her with Jordyn Woods—Kylie's former best friend.

Woods is expected to address the rumors on the next episode of Red Table Talk.