The family affair was captured in a series of photos and videos on Rob, Kim, and Kourtney’s respective Snapchat accounts.
One picture shared by Rob showed Penelope giving her cousin Dream a sweet hug.
“The cutest cats in town,” Kim said — in a video of the moment, filmed with Snapchat’s cat filter placed over it.
Dream’s aunt Khloé Kardashian and great grandmother Mary Jo Campbell were there too. The get-together happened before Khloé celebrated her divorce name change with a driver’s license-lookalike cake.
“I’m in love,” Kourtney captioned a video of her holding her niece — who wore a pink flower-printed onesie.
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“[Dream] is the best and I love her so much and I thank God every day for her cuz she is the best and she is my best friend,” Rob, 29, gushed on Jan. 10.
“I wanted a boy so bad and now that I got my girl, I am so thankful and happy for her and wouldn’t want it any other way!” he added. “I love her so much.”