Kris Jenner's supportive tweet comes just days after Rob Kardashian was seen driving to her home with his new girlfriend Blac Chyna

By Char Adams
Updated February 01, 2016 01:55 PM
Credit: Getty

brightcove.createExperiences(); Kris Jenner is one “proud mama.”

The Kardashian-Jenner matriarch took to Twitter on Monday to gush about her son Rob Kardashian‘s new website for his sock line Arthur George.

“The new @arthurgeorge website is LIVE!! (it ships worldwide!!) #proudmama #shoparthurgeorge,” Jenner, 60, tweeted.

Along with the tweet, Jenner included a photo of a slew of Kardashian’s slogan-oriented socks, which he launched in 2012.

Soon after, Jenner posted another tweet suggesting that Kardashian, 28, create a “#proudmama sock ASAP!!!”

Days earlier, Kardashian was seen driving to Jenner’s Calabasas, California, home with his new girlfriend, Blac Chyna.

The outing marked the couple’s first appearance since news of their relationship broke last week.

Chyna, 27, made headlines this weekend when she was arrested Friday in Austin, Texas, in connection with public intoxication and possession of a controlled substance – and Kardashian drove across the country to pick her up and bring her home Saturday.

The two were photographed driving to the Epione skin care salon in Beverly Hills on Monday.

A source confirmed to PEOPLE on Monday that Kardashian and Chyna (né Angela White) are “dating and have been for a few weeks.”

Chyna was once close friends with Kim Kardashian. Her relationship with the famous family turned sour when Chyna’s ex-fiancé, rapper Tyga, began dating Kylie Jenner.

The source said that Kardashian, who was recently diagnosed with diabetes, is tired of his family “nagging him about his health” and “has ignored their attempts to contact him.”

“Rob has been lonely for so long, so of course it’s great for him to spend time with someone other than his sisters,” the source said of Kardashian and Chyna’s relationship. “Rob likes her and seems to think it’s mutual.”