Apparently, Bruce Jenner has moved on from estranged wife Kris Jenner and onto none other than Kris' bestie. The former Olympian is reportedly dating one of Kris' closest friends, Ronda Kamihira, who broke the most sacred girl code by dating Kris' ex. A source close to the matter told HollywoodLife.com that Kris is feeling 'completely duped.'

Kris's former assistant and close friend Ronda Kamihira, 51, a mother of two is seeing Bruce behind Kris' back and this is making her "extremely upset", reveals TMZ. However, E! reports that the two are "definitely not dating."

The Kardashian family's matriarch feels "duped" after learning that Ronda has reportedly been dating her ex-husband, Bruce Jenner.

Kris Jenner Feels 'Duped' & 'Betrayed'

A source close to the matter told HollywoodLife.com, "This has got to be one of the biggest blows to Kris in her life. She feels completely duped by Ronda. It's complete and utter betrayal," the source added, "It hurts badly because Ronda was one of her best friends, especially when she was contemplating filing for divorce from Bruce. Ronda was also one of the first to know Bruce was moving out."

We definitely understand Kris' feelings as Ronda goes against the most sacred girl code - never date your bestie's ex!

According to a source, as far as Bruce is concerned, being "mad is an understatement," the source says, "Kris could strangle Bruce. She doesn't understand how he could do this to her after all these years. He could date anyone, anybody on Earth. But Ronda? She was so close to the family. Kris is so devastated and she wouldn't care if she never spoke to Bruce ever again!"

Bruce Dates Kris's Best Friend Ronda Kamihira

Apparently, Bruce and Ronda who were first spotted at an Elton John concert in LA on October 4 are not trying to hide their new relationship from Kris. That's extremely rude!

What do you think about Ronda breaking the most sacred girl code? Tell us how you feel!