Blac Chyna, Scott Disick attend Khloe Kardashian's birthday

LOS ANGELES, June 28 (UPI) -- Blac Chyna and Scott Disick surprised fans by attending Khloe Kardashian's birthday party Monday.

The 28-year-old model, who is engaged and expecting with Khloe's brother Rob, and 33-year-old club promoter, who previously dated Khloe's sister Kourtney, joined the Kardashian-Jenners to celebrate Khloe's 32nd birthday.

Blac Chyna was all smiles as she posed for photos with Khloe, Rob and their family at Dave & Buster's in Los Angeles. The bride-to-be even posted a picture with Rob's mom, Kris Jenner, with the caption, "So much fun with Mama."

Disick, meanwhile, snapped a photo with Rob and three of the star's friends. Kris shared the picture on Instagram, writing, "One of the best nights ever ever... This made me so happy. Epic moment last night with Rob and his best friends."

Khloe and Rob's half-sister Kylie Jenner, who is dating Blac Chyna's ex-fiancé, Tyga, was also present at the event. Kim Kardashian had denied rumors of family drama with Blac Chyna and Rob in the July issue of GQ magazine.

"We're all on board," the reality star said of the match. "We definitely see that my brother is happy and getting healthy, and whatever gets him to that place, you know, we're happy for him."

"Has there been so many crazy thing that happened? Yes," she admitted of the complicated dynamic. "[But] I think people want to feel like we're all beefing and have this crazy fight, and we're really not."

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Blac Chyna (L) with Khloe Kardashian (R) and Rob Kardashian at Khloe's birthday. Photo by Blac Chyna/Instagram

Disick and Kourtney, who share three children, split in July 2015 after nine years of dating. Kourtney said in April she is open to a reconciliation with Disick, although sources told People this week the club promoter is dating other women.