Kenya Moore is officially putting down her peach for this next season at least -- 'cause she ain't coming back to 'Real Housewives of Atlanta' ...

and this could possibly turn ugly. Sources with direct knowledge tell TMZ ..

. Kenya will not return as a cast member for the rest of production for the new season (16) after she was sidelined indefinitely for allegedly unveiling sexually explicit posters of newcomer Brittany Eady seemingly performing oral sex. Now, we're told Kenya has not been fired from 'RHOA' .

.. instead, we're told both sides have agreed she's just gonna take a break from the show for now.

Our sources say Bravo is keeping the door open for a future return -- however, we're also told Kenya is considering legal options at this point ...

because she's not happy with how this whole mess unfolded. In case you're unfamiliar, the drama all started when Brittany allegedly threatened Kenya earlier during filming of this upcoming season -- with Brittany allegedly using the word "gun" in a convo about Kenya during one of their feuds. Sources close to production tell TMZ .

.. the claim Brittany threatened to use a weapon was in fact investigated -- but we're told it was never substantiated by the network.

These same sources also say there was never a gun present during filming. After that, Kenya ended up displaying NSFW posters of her co-star at her own hair spa grand opening while Brittany wasn't there. Bravo launched an investigation into this .

.. and in the end, we're to.