Radar has exclusively learned that Simon decided to pull the plug on his marriage because he thought Falynn had cheated on him with "multiple men," including her male assistant.
We're told that Simon decided to file for divorce in January because he truly believed his wife at the time wasn't being faithful and Porsha wasn't even on his radar.
Sources tell Radar, Simon is adamant he didn't start dating the Real Housewives of Atlanta star until months after he filed for divorce. In fact, we've learned their one-month anniversary was Tuesday.
As for his divorce with Falynn, we're told Simon believed she was "having relations with her male assistant" during their marriage.
Interestingly enough, Radar is also told that Falynn has since moved in with her assistant and people are whispering that she might be pregnant with his child.
Simon's beliefs about Falynn's infidelities come to light after one woman called him a "fraud" and claimed she was recently dating him, which overlapped his timeline with Porsha.
But Radar is told the woman's allegations don't add up.
Sources say Simon did take her on one or two dates after his divorce but that's it.
We've learned he did not date her up until last week, as she claims.
Porsha Williams shocked the world when she revealed that she was dating her co-star Falynn's ex-husband on Monday.
Hours later, she dropped the bombshell that they were actually engaged.
We're told that Porsha and Simon understand their relationship moved quickly but our sources say they are living with the motto that "sometimes love is crazy."
On Tuesday, Faylnn broke her silence on her ex-husband's engagement to Porsha.
As for Porsha's relationship with Falynn, the RHOA star made it clear they are not friends despite appearing on the Bravo show last season together.
In an Instagram post, Porsha clapped back at haters.
"For all of you that need facts, I get the optics but Simon filed for divorce from a previous marriage in January. I had nothing to do with their divorce filing. That’s between the two of them," she insisted.
Adding, "Falynn and I are not friends, and Simon’s divorce has been settled. Our relationship is a positive, loving step forward in everybody’s lives."
Radar has reached out to Falynn for comment.