Kyle Richards Spills on 'Out of Control' Night With Kim Kardashian and Kris Jenner

But before the two dove into a revealing game of "Post Reunion Stress Disorder," a caller asked Kyle about her craziest night with longtime friend Kris Jenner.

"Probably our karaoke night on Valentine's Day this last Valentine's Day," Kyle said. "We got a little out of control, no doubt. It was actually just a very small group of us at the house, and we got a little crazy. And then Kim decided to put it on her Instagram and so did Khloe, so the whole world kinda knew what happened, but it was a crazy night. And the next day, we were dying."

Andy then grilled Kyle about the most recent "RHOBH" reunion, after which Erika Girardi was torn apart on social media for being unnecessarily aggressive toward Teddi Mellencamp Arroyave and overall a bit moody.

"I don't think she was herself that day," Kyle said. "I've had backlash, too. I know Erika's a good person, so [the viewers] will see the real Erika. I know Erika, and I really do believe she wasn't herself that day. I could see it myself. And when I saw the backlash, I was a little taken aback, but I know Erika to be sweet, and we've always gotten along, but she was not herself that day, right?"

Andy hesitated, then said, "Uh, yeah, she said she had a bad migraine."

During the reunion, Erika barked at Teddi, "Raise up, or get the f-ck out," which Kyle told Andy she felt was "uncalled for."