Last night on the season premiere of Love and Hip Hop Atlanta Stevie J and Joseline celebrate their marriage with a post-marital birthday bash. MiMi admits to Erica and Ariane that she and Nikko made a sex tape and that she doesn't believe Stevie and Joseline are actually married. Erica and Ariane promise to get to the bottom of it. Rasheeda and Kirk try to co-parent their baby Karter. We are introduced to Waka Flocka Flame's fiancĂ© Tammy Rivera and Nikko tells MiMi that their sex tapes were stolen and that they should capitalize off the situation…