Kyle Richards and Lisa Rinna may have run into drama while filming The Real Housewives of Beverly Hills season six.

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Earlier this week, Rinna took to Twitter, where the returning housewife spoke of being honest. Just over an hour later, her co-star and friend, Richards, responded.

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During season five of The Real Housewives of Beverly Hills, Rinna dealt with non-stop drama from Kim Richards, and at one point, the two nearly had a physical altercation. Luckily, as season six continues, she hasn't had to deal with the troubled reality star, who was reportedly fired from the show months ago.

Still, the things Richards said about Rinna's husband live on.

"Harry didn't do anything," Rinna said during an appearance on Access Hollywood Live, via Yahoo!, in April. "When you insinuate something about someone, it's out forever. I mean, it really is. You can't prove a negative... Harry didn't do anything, of course, but the fact that she threw that out into the universe, I think is really irresponsible and dangerous — that's what really fired me up, to be honest with you."

"I have a beautiful family and marriage," Rinna continued. "Shame on Kim Richards for going after him and not going after me. Shame on her.”

The Real Housewives of Beverly Hills season six is expected to premiere on Bravo this winter.