Is Kourtney Kardashian jealous now that Scott Disick is dating a look-alike of Kendall Jenner?  He has been seen making rounds with a young model, who could really be mistaken for his ex’s younger sister.

While the estranged couple have been friendly despite their split last year, rumours claim the mother-of-three is not comfortable seeing her baby daddy with her sister’s look-alike.

“She’s noticed how much his new girlfriend looks like Kendall, how much all these girls he hooks up with seem to look like her younger sisters, it’s weird to her,” a source told HollywoodLife.

The source added that she used defend him from people claiming he is eyeing on her sisters. However, Kourtney Kardashian stopped defending Scott Disick now that he is dating Kendall Jenner’s “identical twin.”

The model in the middle of the controversy is Christina Burke, who is tall and brunette just like the Victoria’s Secret model.

Also Read: Scott Disick Instagram Disaster: Kourtney Kardashian Embarrassed?

“She always used to defend Scott when people accused him of perving on her sisters, but she doesn’t defend him anymore, at this point she doesn’t know what to think,” the news site’s source added.

Nevertheless, Kourtney Kardashian does not believe his baby daddy slept with any of her sisters. The source added that she does not “think  he would sink that low.” More importantly, “she trusts her sister.”

Amid the controversy of Scott Disick dating a Kendall Jenner look-alike, Kourtney Kardashian and their kids partied with him to celebrate his birthday, reported New York Daily News.

Also spotted at the event were Kim Kardashian and daughter North West, Khloe Kardashian, Kris Jenner and Corey Gamble.

Also Read: Scott Disick Birthday 2016 Makes Kris Jenner Emotional?

The momager made a picture collage of her and her grankids’ dad. Kourtney Kardashian also posted a message for Scott Disick on her Instagram account, where she said “happy birthday baby daddy!”