Shannon and David Beador finally reveal that fellow Real Housewives of Orange County castmate, Heather Dubrow, knew about David's affair.
The couple sat down with Andy Cohen on Watch What Happens Live to discuss the affair that rocked their marriage to the core.
"At the time of the affair, Heather knew about it," David shared, recalling an email he had sent Shannon suggesting he move out that Heather soon became aware of thanks to mutual friends of his mistress. "And she didn't say anything."
"So when you went over to Heather's house trying to find out how she knew about the email," Andy asserted to Shannon, "What you didn't know was that Heather knew about the affair."
During a flashback, Heather is seen telling Shannon to go home, insisting that the email ordeal is "none of my business."
"Looking back, it's the ultimate girl code," Shannon tells Andy of the clip. "I'm very appreciative of that."
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As Radar previously reported, the two were able to work through their issues with couples' counseling – as seen on RHOC – though Shannon admits the affair "shattered their children."