When it comes to the Kardashian-Jenner family, Rob Kardashian is pretty much the rare card of the pack. The 28-year-old and youngest core Kardashian kid hasn't been seen on Keeping Up With The Kardashians in well over a year, keeping himself away from the glare of the paparazzi's camera flashes and staying relatively quiet (and when not quiet, then at the very least cryptic) on social media. He even missed his big sis Kim's 2014 wedding to Kanye West.

Over the weekend, however, Kourtney, Kim, Khloe, Kendall, and Kylie's brother came out of the woodwork to show his youngest sis some love for her new lip kit. Taking to Instagram, Rob posted a cute photo of a wrinkly bulldog with his paw pointing to Kylie's web-site for her newly sold out lip products. (For those who don't know, on Monday Kylie launched a set of three lip makeup kits that promptly sold out online.)

"I guess someone is disappointed they didn't get Kylie's lip-kit," Rob captioned the photo, adding, "Don't worry buddy, more coming soon!"

Last month, Rob was notably absent from a Thanksgiving family photo opp with the rest of the Kardashian-Jenner crew. In response, Kris Jenner recently shared in an interview with UsWeekly, "He lives with Khloe... He's doing all right. You know, he's doing his best. He's not into being on camera as much as the rest of us. But he’s working on himself. He’s going to be okay."

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