MTO News is getting more details on the explosive fight between Nene Leakes and Kenya Moore, which will air on the finale of the upcoming season of the Real Housewives of Atlanta.

And the new information suggests that Nene may have been having 'inappropriate' conversations with Kenya's now estranged husband, Marc Daly.

On the upcoming season of the Atlanta Housewives Nene Leakes and her husband Gregg will announce that the couple is "opening" up their marriage, so that each can step out to other lovers.

And shortly after Nene got the "green light" to go after side d*ck, MTO News learned that she began having "conversations" with Kenya Moore's estranged husband Marc.

When Kenya learned about Nene reaching out to her husband - and possibly flirting with him (or more) - she confronted Nene. And the confrontation, which took place at Kandi Burress' baby shower, turned explosive.

Here's what top Hollywood insider B Scott is reporting:

“Kenya confronted NeNe after hearing that she’d been talking to Marc behind her back. Things escalated quickly, with NeNe telling Kenya that Marc said he ‘doesn’t even like’ her....”

That’s when, according to our sources, “NeNe began to make a ‘hocking’ sound as if she was preparing to spit in Kenya’s direction.”

Wow . . .