mimi & stevie j*Hip-hop producer Stevie J caught a fistful from his baby mama, Mimi all because he was stupid enough to joke about his sidepiece, Joseline, in front of her and TMZ caught it on video (below)!

The “Love and Hip Hop Atlanta” couple were all smiles when they left My Studio nightclub in LA Wednesday night until Stevie made a crack about Joseline, his on/off other woman, getting into a fight with Mimi. Big mistake.

For those who don’t know, Joseline took a huge swing at Stevie’s skull herself … during a twisted couple’s therapy session between Stevie, Joseline AND Mimi.

Well, based on the video, it doesn’t look like Stevie learned a damn thing in therapy.