Andy dives right into it all in this tense sneak peek.
While the episode doesn't air until Sunday, a sneak peek clip shows Andy asking Nene if her husband gets on her about "revealing too much" about their relationship on the show.
"Yeah," NeNe says somberly. "He gets on me about revealing a lot of things."
Turning his sights to Gregg, Andy asks, "Do you take issue with some of the things she says on the show?"
"I think that there are limits," Gregg replies, adding that he thinks his wife should "spoon feed" and not "shovel feed" viewers certain information about their marriage.
"There's a lot of things I don't say," NeNe interjects. "Gregg knows that."
Going right in for the kill, Andy asks Gregg if he wished NeNe hadn't spoken specifically about his past infidelity on the show.
"That was so long ago, that it really just didn't have any weight," Gregg replies. "The hurt from that got removed from me a long time ago"
Looking at NeNe, Andy says, "Maybe it didn't get removed from you?"
"Maybe," she replies with a sad smile.
NeNe first revealed Gregg cheated on her in a previously unaired scene from the ladies' trip to Tokyo last year, which Bravo released in December. During a game of Truth or Dare, newcomer Shamari DeVoe asked NeNe, "[Has] there ever been any infidelity in your relationship?"
"Yes. [It was] Gregg," NeNe replied. "There was many days when I just thought I was gonna divorce Gregg."
"I think my breaking point came when Gregg and I couldn't communicate," she added. "Gregg has never been a good communicator. And the way that he communicates now is because he's learned a lot."
NeNe, 51, and Gregg, 64, married for the first time in 1997. They divorced in 2011 and remarried in 2013.
"I think a lot of people were surprised when I filed for divorce," NeNe said during an April 2018 appearance on TV One's "Uncensored" series. "I filed for divorce because I always felt like you have to teach people how to treat you, and I felt like at that time that Gregg wasn't treating me the way I felt I should be treated. It was me teaching Gregg a lesson, and I think he got it."
Gregg was diagnosed with cancer in May 2018, with NeNe taking on the role of caretaker. Gregg's cancer battle has caused major stress on the marriage, prompting NeNe to lash out at cast and crew and vent to fans on social media.
"The Real Housewives of Atlanta" reunion continues on Sunday at 8 p.m. on Bravo.