"She was even saying I love you. She is in love with this guy apparently," Bailey revealed, repeating what her husband Peter Thomas had told her.
"So she was having an affair on him and he's not even in prison yet?" Moore asks incredulously, and then loses her temper about the double standard.
"What? Excuse me? I have just spilled tea all over myself," she dramatically exclaims.
"How do you look me in my face and call me a wh*re," Moore asks, referring to a previous time when Parks was insulting her. "You are f**king married!"
And Bailey agrees, saying she brought up the cheating story because of the "double standard, and says Parks shouldn't be throwing rocks if she lives in a glass house.
"There is way too much wh*re calling!" Bailey declares.
And Moore agrees, saying: "Over the past few years, Phaedra has seemed to have an issue telling the truth."
Parks has strenuously denied all infidelity allegations.
Tune into the Real Housewives of Atlanta on Bravo on Sunday, March 1, at 8/7c.