Kris Jenner, 58, and her husband of 23 years, Bruce Jenner, had an amicable split last October followed by Kris officially filing for divorce last month, reported Us Weekly.

While Kris has said the idea of dating again was "daunting," Bruce, 64, has wasted no time starting a new romance with Kris's dear friend, Ronda Kamihira, reports People Magazine.

"Kris is devastated," a source told People Magazine. "This was her former assistant and best friend of 20 years."

The source also said that the Jenners' daughters, Kendall and Kylie, grew up with Kamihira's two children and have been longtime friends.

Kris and Kamihira recently enjoyed a vacation together at Kardashian family friend Joe Francis's Punta Mita estate.

It's difficult to imagine what Kris felt as she called in to Ryan Seacrest's KIIS FM radio program on Tuesday to address the rumors about Bruce and Ronda's dating.

"I have no idea what Bruce does in his personal time," the mother of six told Seacrest. "We've been apart for a long time."

Bruce and Kamihira made their first public appearance at an Elton John concert in LA on Oct. 4.

And it seems Kris no longer feels dating is "daunting." RadarOnline revealed Tuesday that the "Keeping Up with the Kardashians" star was photographed dining and holding hands with a mystery man at the Casa Vega restaurant in Sherman Oaks, California, on Oct. 14.

Kris and Bruce are filming the 10th season of their reality show, "Keeping Up with the Kardashians." There is no word yet if Bruce's new love interest will be included in filming.

Earlier this month, Kris told People Magazine, "We work together to make sure that we're both happy. We are well-rounded human beings that are going through a tough time. You just do the best that you can."