Whitney and Sara reunite and, over dinner with Kacy and Cori, demonstrate the same dysfunctional behavior that's marked their entire relationship. Elsewhere, Sajdah pulls out all the stops for a birthday party for Chanel despite having only been dating a month; a newly sober Romi turns her focus to her jewelry-designing business; suddenly single Claire moves into her own place; and Cori and Kacy throw a big bash to celebrate their impending mommyhood.