Ne-Yo's Ex Monyetta Shaw-Carter Claims He Wanted Too Many Threesomes

Ne-Yo's ex, Monyetta Shaw-Carter, is opening up about what led to their breakup -- at least from her POV, it was about overcrowding in the bedroom ... as in, too many threesomes!!!

Monyetta was a recent guest on the "Haus of Aaron" podcast, where she poured some alleged tea, claiming Ne-Yo reneged on his promise for them to star on "The Real Housewives of Atlanta" as a couple ... out of fear his music career would be tarnished.

As for the threesomes ... Monyetta says she was open to allowing others to participate in the bedroom, but saw red flags when Ne-Yo attempted to make it a regular thing.

Monyetta says she was totally down for it a couple times a year, but any more than that made her feel inferior in the relationship ... so, she cut her losses.

We just spoke to Jidenna about having multiple sex partners -- as he's been using his own experiences with polygamy to drive his music. His expertise is pretty much aligned with Monyetta's POV ... if the woman's unhappy, things likely won't last.