Porsha Williams -- My Divorce Is 100% REAL ... But I Wish It Wasn't

Porsha Williams says her divorce from former NFL star Kordell Stewart is ABSOLUTELY NOT a publicity stunt or a contrived plotline for "Real Housewives" ... but she wishes it was.

After TMZ broke the story that Kordell pulled the plug on the marriage back in March ... several media outlets called B.S. on the split, claiming it was a cheap P.R. stunt concocted in the hopes they would stay on the show for another season.

But Porsha's rep tells us ... the notion of a phony divorce is "absolutely ridiculous" ... explaining, "Given everything this abrupt divorce filing has put her through in the public, [Porsha] would never bring something like this on herself, especially with them having a child in the house."

The rep adds, "[Porsha] wishes things could have been different [with Kordell] but that simply is not possible.”

We also spoke with Porsha's attorney, Randy Kessler, who says the two sides are trying to keep the split amicable and are working on reaching a separation agreement as quickly as possible.