'Housewives' Star Kenya Moore -- Apollo's a Liar! We're Not Sexting Buddies

"Real Housewives of Atlanta" star Kenya Moore says she's no sext-messaging slut hooking up with Phaedra Parks' husband ... and thinks he spun the whole lie just for attention on the show..

Parks' husband Apollo Nida claims Kenya had sexted him while they were both in L.A. last year ... and proposed a face-to-face hook up too.

Last night on 'RHOA' ... Nida said Kenya "wanted to f**k, ok, she wanted to have sex in L.A." ... although he denies anything ever happened.

Moore tells TMZ she and Nida did text each other -- but there was nothing sexual, and they never met up. She gave us screen shots of what she claims was their text convo last October.