Kourtney Kardashian’s 14-year-old son, Mason has reportedly moved out of her home to live with his father Scott Disick, with the reality star believed to be ‘heartbroken’

Kourtney Kardashian’s nest is getting smaller as one of her kids has moved out, according to reports.

The Lemme founder shares three children with her ex Scott Disick – Mason Disick, 14, Penelope Disick, 12, and Reign Disick, nine. She recently welcomed her fourth child Rocky Thirteen Barker, with her husband and Blink-182 drummer, Travis Barker.

Kourtney recently had to come to terms that her oldest son, Mason, was growing up after he made his social media debut and created an Instagram account. He posted his first picture on May 26 with Kourtney commenting: “My first baby,” with Kim and Khloe shocked that the 14-year-old is on social media.

Even though Kourtney expressed her sadness that her oldest child is growing up, a source claimed to Life & Style that Mason moved out of his mother’s home and moved in with his father.

The source said: “She is heartbroken over it. While Kourtney is giving Mason space to work through his feelings, at the end of the day, she blames Scott.” They continued: “The kids can have all the sugar and junk food they want [at his house], and they can stay up as late as they want and watch whatever they want. [He] buys them anything they ask for.

“It’s no surprise they all love going to his house.” The insider added: “They love their dad, but it helps that it’s a free-for-all when they’re over there!”

Fans speculated something was up between Kourtney and Mason since she has not posted pictures with her son or been seen with him. In an episode of the new season of The Kardashians, Kourtney revealed that Mason stayed with Scott back in California when she, Penelope, Reign and baby Rocky headed to Australia for Travis’ tour.

Kourtney admitted the arrangement made her “really sad” but said she was determined to make “the most of every second” with her other children after spending 40 days at home with her newborn.

Speaking in her confessional, Kourtney said: “I am in Australia, we made it. We’ve been having the best time. Travis is touring to different cities in Australia for about a week, but because I was on bedrest before, and then having a newborn at home, I haven’t really had any outings with my other kids, so really I wanted to stay in Sydney.”