Kourtney Kardashian’sengagementtoTravis Barkerisn’t an exciting occasion for all.
Kardashian’s exScott Disick— who she split from in 2015 after nine years of dating — is “not happy about the engagement,” a source tells PEOPLE exclusively.
“Scott never approved of Kourtney dating Travis. He has struggled with their relationship,” the insider says. “He always had this idea that he and Kourtney would eventually get back together. He was pretty shocked when he found out that she was dating Travis.”
Barker, 45,proposedto Kardashian, 42, on Sunday at the Rosewood Miramar Beach Hotel in Montecito, Calif. Sheannounced the newson Instagram, sharing photos from the romantic moment with the caption: “Forever @travisbarker.”
The sunset, beachside proposal “was a complete surprise” for the Poosh founder, a family friend told PEOPLE.
For more on howScott Disickfeels aboutKourtney Kardashianand Travis Barker’s engagement and other top stories, listen below toour daily podcast PEOPLE Every Day.
Kourtney Kardashian/Instagram

The newly engaged couplereceived congratulatory messagesfrom family and friends across social media, even fromBarker’s own childrenwith ex-wifeShanna Moakler. While Moakler, 46,seemingly reacted to the newswith cryptic Instagram Story posts, Disick, 38, has yet to comment publicly.
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PEOPLE broke the news of Kardashian and Barker’s relationship in January. As their romance progressed, a source saidDisick was “struggling"due to how serious the pair had become.
Presley Ann/Getty; Dimitrios Kambouris/Getty

“Yo is this chick ok!???? Broooo like what is this,” Disick allegedly wrote to Bendjima, sharing a photo of Kardashian and Barker kissing. “In the middle of Italy.”
Bendjima, 28, allegedly responded, “Doesn’t matter to me as long as she’s happy. P.S. I ain’t your bro.”
PEOPLEconfirmed Disick’s splitfrom modelAmelia Gray Hamlinthe following month. They had been dating for nearly one year.
source: people.com