"I don't really know much about their relationship. I think they're definitely friends, and they seem great," Kris told ET. "But I see Rob every single day and he comes by and he's really excited about spending time with the kids because North and Saint live with me, so he comes by for that visit. That little dose of kids, which is kind of delicious. It's great."
The 60-year-old momager praised Rob for having a new lease on life.
"Rob has been in a really good place for a while," she bragged. "He's on it right now, and he's engaged [in life]. I love seeing him happy about what he's doing."
Jenner said her son is very hands-on right now with his sock line, Arthur George
, and so is his new girlfriend. On Wednesday night, Chyna shared a NSFW pic of her posing in nothing but her beau's socks and a thong to celebrate having 5 million followers on Instagram.
"He loves his sock business," Jenner told ET. "We did the relaunch and he is excited about that. He's got an amazing website, with all his things. He's just getting started. He loves fashion."
It's been a busy week for Jenner, who not only helped her son with his socks, but also assisted her youngest daughters, Kylie and Kendall Jenner, in launching their clothing collection. "I think what always amazes me, and I'm so impressed by, is their work ethic," she said of her six children. "They have an amazing work ethic, amazing integrity and an amazing focus and vision for whatever project they're working on."
Jenner did admit that it's not always easy being the head of such a famous family. "I feel like I have a different job every single day, because of the nature of what we do," she explained. "I'll run to Khloe's talk show (Kocktails With Khloe) and do that with her. Kim will be in a fragrance meeting, because she's getting ready to launch a new fragrance. There's so much going on, that I want to be there for everybody. So, I drive a lot. I'm on the freeway a lot."
ET was at the launch of the Kendall + Kylie collection
in New York City on Monday, and the youngest Jenner sister admitted that she takes after her mother when it comes to being a businesswoman. Check out our chat with Kylie, where she referred to herself as a "mini-Kris Jenner."