Party time. Kim Kardashian and her family headed to San Diego on Tuesday, July 26, to celebrate grandmother MJ's 82nd birthday, and they were joined by Rob Kardashian's pregnant fiancée, Blac Chyna.

The Kardashian-Jenner clan, including Kim, her daughter, North West, sisters Khloé and Kourtney Kardashian, along with Kourtney's ex Scott Disick and their kids, Mason, Penelope and Reign, joined Kris Jenner to fete Jenner's mom, MJ, at La Valencia Hotel in La Jolla, California.

Kim, 35, posted a Snapchat video during the party that showed her cradling Chyna's growing baby bump. 

While Rob, 29, wasn't visible in any of the family's Snapchat and Instagram pics, his fiancée, 28, wore her engagement ring, despite recent drama between the couple that saw the reality star delete all of his Instagram pictures of Chyna earlier this week.

While there were rumors that they had split, a source told Us that the pair, who got engaged in April, are working through an "explosive fight" they had over the weekend.

"Yes, it was a fight, but they will be over it and basically are," the source told Us. "They've been spending a ton of time together and filming a show together. Add to that the stress of a new relationship, and it's inevitable that there will be some tension and fighting."

Kim also posted a funny Snapchat video earlier on Tuesday that documented her wild road trip to San Diego with Khloé, 32, and North. 

The Keeping Up With the Kardashians star's 3-year-old daughter with husband Kanye West was full of energy as she sat in the backseat, demanding attention from her doting aunt.

The Lord and the Lady

A photo posted by Khloé (@khloekardashian) on

Our best blue steel 💙

A photo posted by Khloé (@khloekardashian) on

While the trio drove south, Kourtney, Scott and their kids flew down to San Diego in a small plane, which the Lord documented in a cute Instagram pic.

Small trip small plane. Left the big body in the hanger

A photo posted by Scott Disick (@letthelordbewithyou) on

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