Kourtney Kardashian Celebrates 36th Birthday In Vegas: Did Kendall & Kylie Jenner Skip Their Sister’s Birthday Party?

Kourtney Kardashian rarely parties these days. The busy mom made an exception when she celebrated her 36th birthday at 1 OAK Nightclub at the Mirage in Las Vegas, according to the Los Angeles Times. Kourtney was there with her boyfriend Scott Disick and some of their closest friends.

Kardashian reportedly had dinner at the Stack Restaurant & Bar at the Mirage before she partied the night away. Disick is no stranger to partying at the Mirage or at Las Vegas in general. The reality star has hosted at 1 OAK twice this year. Kardashian also partied it up with her closest girl friends including Courtenay Semel, Melissa Kolker, and Sarah Howard, according to the report.

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Kourtney finally headed to 1 Oak where she wore a black skirt by Balmain, a matching black Wolford bodysuit, and black lace-up heels by Tom Ford. Kardashian and her friends partied at a VIP table that was filled with unlimited supplies of champagne and Grey Goose cocktails, along with a four-tier birthday cake, a magnum bottle of Dom Perignon, and head cutouts of Kourtney Kardashian and Scott Disick.

Other celebrities that were at Kardashian’s birthday party were Boys II Men, who were reportedly filming for a new music video. The people that weren’t at the birthday were Kendall and Kylie Jenner, according to Celebrity Dirty Laundry. The Jenner sisters didn’t even take to Instagram to wish their older Kardashian sister a happy birthday. Kim and Khloe Kardashian used the photo-sharing app to wish their older sister a great birthday.

The report said that Kendall and Kylie had nothing nice to say about sister Kourtney. The sisters were too busy partying it up at the second weekend of the 2015 Coachella Valley Arts and Music Festival to spend time with their older sister. Hopefully, Kendall and Kylie stopped to remember their sister by sending Kourtney a happy birthday text message.

Maybe the Jenner sisters were embarrassed by Kardashian’s party photos. Kardashian celebrated her birthday by sharing strange photos of herself on Instagram. In one of the photos, she wears a breast-feeding pump as she sits on top of a kitchen island. Of course, her breasts are covered up in the photo. Kardashian captions the photo: “What happens in Vegas stays in Vegas.” Fans didn’t comment that the reality star looked intoxicated in the photo. Instead, they told the Kardashian that it’s “Good for you, and good for the baby!!!!”

Kardashian also opened up as to why she didn’t embark on the Armenia trip. She revealed on Instagram that she felt “anxious” about bringing her three children on the family trip.

“I wish I was in Armenia with my sisters on #siblingsday! I didn’t end up going to Armenia because it was making me too anxious with three young children. I do wish that I could have experienced the trip with my sisters but I do know that we will all go to Armenia together someday.”

It’s no surprise that Kourtney is a busy mother these days. It’s no wonder that she wanted to let loose for her birthday.

[Image: David Becker/Getty Images for Clear Channel]