Ne-Yo Says He and His Baby Mamas Refuse To Rip Each Other In Front Of Kids

Ne-Yo is insisting he maintains a healthy relationship with the 3 women with whom he shares his 7 children ... and he says the secret to being stress-free is an easy one: parents aren't allowed to sling mud in front of the kids.

The R&B star broke down his reasoning to former video vixen Gloria Valez in a podcast clip Thursday, explaining any headlines he and his exes make bickering could possibly affect the children down the line, so they refrain from doing so.

Ne-Yo shares 3 children with ex-wife Crystal Renay, 2 with ex-fiancée Monyetta Shaw and 2 with ex-girlfriend Sadé Jenea ... but says everyone gets along ... as the kids refer to their half-siblings' mothers as the "extra moms."

He credits his mother and sister for upholding his support system in raising the kids — but isn't shy about dealing with the occasional friction. Baby mothers and fathers are known to mirror immovable forces and unstoppable objects, after all.

Crystal and Ne-Yo have been showing positive PDA as of late, despite ending their union and Ne-Yo's new dilemma is convincing his kids to adjust to his fame.