Kendall Jenner was involved in a sexual relationship with step-sister Kourtney Kardashian’s former partner Scott Disick, Hollywood Life reported Thursday citing Star magazine. Jenner and Disick have reportedly not been on speaking terms after Kardashian broke up with the 32-year-old.

The Star magazine reported that the sexual fling between the two happened when Kardashian was pregnant with Disick’s third child, according to Hollywood Life.  “After their partying episodes, he saw Kendall as an adult. A superhot and fun one at that,” a source told the magazine. “This is what their relationship has turned into. What should be a brotherly/sisterly love has become sexualized. Scott clearly finds her attractive, and she likes the attention. It’s just wrong.”

When the 36-year-old Kardashian became aware of their relationship, she was in “complete shock and disbelief,” according to the report. “But after she processed the information, she was devastated … She started screaming at [Disick], calling him ‘sick.’ But he kept denying it. He stormed out and the next she heard of him, he was doing what he always does — drinking his problems away. This time it wasn’t in Las Vegas, it was in Aspen [Colorado],” the source reportedly said.

Moreover, Jenner and Kardashian’s mother Kris Jenner was “at a loss” and “worried” about Mason, Penelope and Reign — Kardashian’s three children with Disick, the magazine reported . “She [Kris] confronted Kendall about it. But Kendall denied everything, then accused her mom of being happy about the rumors because they will raise her previous TV ratings,” the insider reportedly added.

Jenner, who is rumored to be dating One Direction singer Harry Styles, reportedly said that she was “flattered” by football star Cristiano Ronaldo’s flirting with her and was ready to go on a date with him. However, that did not mean Jenner and Styles were over their relationship.

“She’s not putting all of her eggs in one basket. She’s staying true to her New Year’s intentions of going with the flow, enjoying herself and not taking anything too seriously. Plus, if Harry wants a more committed relationship with her, then it’s up to him to make the first move. She’s not about to chase after anyone,” a source reportedly said.