The father-of-three is consumed by jealousy over his ex's new relationship with male model Younes Bendjima and sources are revealing exclusively to Life & Style that he is trying to put an end to it.
"Scott will do anything to sabotage Kourtney’s relationship, including showing up wherever Kourtney and Younes are hanging out together,” the insider says. “He’s also been asking around, trying to get some dirt on Younes so he can bring it back to Kourt and persuade her to dump him."
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The source continued, "He even threw a full-on tantrum recently, yelling and screaming at Kourt that Younes isn’t right for her."
However, it doesn't seem that Kourtney, who shares kids Mason, 7, Penelope, 4, and Reign, 2, with Scott, is ready to put an end to her fling with her 24-year-old boy toy. On a recent episode of KUWTK, the brunette beauty made it very clear she was over Scott's playboy ways after he was caught sneaking a model into his hotel room during a family vacation.
"I think after everything that's happened here in Costa Rica, Scott knows it's done," she said in the confessional, "But just saying those words just lets both of us move on."
She then proceeded to tell Scott her feelings directly, saying, "I think the moral of the story is we are never getting back together," before Scott defensively responded, "Perfect, you've driven me nuts for 10 years. That's all I ever wanted you to say."
More recently, Scott has been spotted trying to move on with 21-year-old model Ella Ross, who looks just like Kardashian BFF Chrissy Teigen — but it's obviously not working.
"He can’t stand to see Kourtney happy with another man,” adds an insider.
For more exclusive celebrity news, be sure to pick up the latest issue of Life & Style, on newsstands now. For a look back at Scott and Kourt in happier times, check out the gallery below!