Kourtney Kardashian flashed her toned tummy as she attended the 13th birthday party of her first born son Mason Disick on Saturday night.
The reality star, 43, awkwardly reunited with her ex-boyfriend Scott Disick, 39, at the party. The former couple share three children together, Mason, 13, Penelope, 10 and eight-year-old Reign.
The whole family got together to celebrate Mason's birthday, including sisters Kim and Khloe Kardashian, Kendall and Kylie Jenner, and momager Kris Jenner.