It was the shock heard ‘round the Hills universe: Did Lauren Conrad hook up with Audrina Patridge's on-again off-again on-again beau Justin Bobby? Well, years after the ridiculous supposed romantic encounter, the former MTV cast member is telling all about the unforgettable quasi love triangle.

"A mutual friend of ours called me and told me that he was there and didn’t want to tell me but knew he wouldn’t be able to look me in the eye if he didn’t come clean," the soon-to-be mom revealed on her website, in anticipation of the hit series' 10th anniversary. "I was devastated and couldn’t believe it at first."

"Then, neither of them would call me back or respond to my texts and the producers, of course, wanted me to talk about it on camera, which took some pushing," she explained -- and you can watch that confrontation scene in the clip above. "That friend has since passed, and I really don’t care about what happened anymore. I’m happy where I am now, and the past is the past!"

Like JB memorably uttered, "Truth and time tells all" -- so there we have it.

In addition, Drina stated her one regret from her MTV tenure. And, no, it wasn't isolated to a singular incident or relationship.

"That I didn't get a therapist!" she wrote. "I could have used some good life-coaching."

To read more secrets from Audrina, check out her story here -- and be sure to stay with MTV News for special Hills coverage commemorating a decade since the series' premiere!