It looks like Mason Disick is having a hard time adjusting to his newest cousin North West. While at the premiere of "Thomas & Friends: King of the Railway" Kourtney Kardashian revealed to E! News that her little boy is just a tad bit jealous of his cousin.

When asked if Mason knew baby Nori was his cousin Kardashian responded: "He does. I think he gets a little bit jealous because he has a special relationship with his Aunt Kiki, and she takes away from that so he's still adjusting."

Aww, how cute! Kardashian explained that the 3-year-old is used to getting all the attention and is still trying to get used to sharing the limelight with Nori. To help make the adjustment easier for Mason the reality star told People magazine that she tries to shower him attention.

"I give him so much attention, and he gets so much attention from everyone else that I'm like I don't even know," Kardashian said.

She also said her sister has no idea how to handle it and often asks Mason if he still likes her - which of course he does. The mom of two also told People that her youngest child Penelope is already developing a close bond with North.

"Whenever [Penelope] sees [North West] and, you know, the second she walks into the room, Penelope gets so excited," Kardashian said. "We never really had cousins that were close in age... so I'm excited."

She also said Penelope is "just in awe" of the Kim's baby. According to Hollywood Life, Kim and Kanye West brought baby Nori for Penelope's first birthday party. Since she is only a couple months old a source told the website that North stayed inside the house with her mom.

"[North] stayed in the house because she's too little to be around that many people," the source said. "She's doing great though!"