Kourtney Kardashian tried to teach boyfriend Scott a lesson by not letting him attend North  birthday

A source told TMZ Kourtney decided not to let Scott attend but her actions backfired when he opted to stay in Southampton, New York to enjoy a belated birthday celebration for himself on Saturday (20.06.14), after turning 31 on May 26.

TMZ reports: "Disick didn't stew over the snub - he had a belated birthday party at 1Oak [club] in The Hamptons where he sprayed champagne on fellow party-goers."

The source claims Kourtney believed Scott would "feel the burn" for being left out because North's party was thrown in their backyard.

They added: "The tension revolves around Scott's propensity for partying and leaving the family in the dust.

"Kourtney gave Scott's plane ticket to a nanny ... again, a not-so-subtle insult that seemed lost on Scott."

Scott, who has children, Mason, four, and Penelope, 23 months, with pregnant Kourtney, reportedly arrived at 10ak in his Bentley with a huge entourage in tow shortly after midnight and wasted no time letting his hair down.

Party-goers claim he was "pretty wasted" and didn't seem to mind being away from his girlfriend.

Meanwhile, North and her parents, Kanye West and Kim, were joined by a number of famous pals, including Ciara and her one-month-old son, Future, and fashion designer Rachel Roy, at a Coachella-inspired 'Kidchella' party at Kourtney and Scott's $8.45 million mansion, which they purchased earlier this year.

The couple spared no expense for the celebration, which took place almost one week after North's actual birthday last Sunday 15th of June.