The love triangle between Stevie J, his baby mama Mimi Faust and “artist”/side piece Joseline Hernandez just turned into a love square … because apparently there’s ANOTHER woman that has been thrown into the mix!

A little birdie whispered into our ear … that the “Love and Hip-Hop Atlanta” loverboy has a new girlfriend named Tammie Grant, and she’s pregnant with his baby.

According to a highly reliable source, “Steebie” and Tammie, who is recently divorced, have known each other for some time now, and recently started dating. Tammie Grant is the ex-wife of NBA player Gary Grant, and is said to be a partner at Stevie J’s record label “The SJ Music Group.”

SOURCE: Gossip on This