Scott Disick celebrated his 36th birthday on Sunday, and, naturally, it was a whole Kardashian-Jenner affair! Kourtney, Khloé, Kylie, and Kim all attended the festivities, along with girlfriend Sofia Richie and his and Kourtney's three kids [1], 9-year-old Mason, 6-year-old Penelope, and 4-year-old Reign. Sofia documented the bash on her Instagram stories, which included temporary tattoos, lots of flowers, a black-and-white themed cake, and clothing from Scott's Talentless line [2].

While the idea of having your girlfriend and ex-girlfriend at your birthday party may seem a little awkward for some, Scott and Kourtney know that coparenting is all about balance. Back in December 2018, Kourtney poked fun at her family dynamic [3] with a silly Instagram snap and later joined Scott and Sofia on vacation [4] in Mexico.

Scott and Sofia have been dating since late 2017, and the father of three recently revealed on an episode of Keeping Up With the Kardashians [5] that Sofia is totally understanding [6] of his relationship with Kourtney. "Sofia knew going into this that I was extremely close with Kourtney," Scott said. "She was like, 'Listen, I will never get between you and your family and your children. Just speak to me and make me comfortable.'" See every photo from Scott's fun-filled bash ahead!