Juliette and Ben might be living together (or were). When the book club is arguing over whether or not Carrie is actually literature and the guy arguing against it says he knows now why Ben wasn't present and that he knows the 'host picks the book, but seriously [Ben] wouldn't read it in the damn bathroom ' Juliette responds that she is the host, with an emphasis on 'she' and so she picks the book. I guess she could just be acting rebellious. They act like she just found out he is cheating on her in the beginning of the episode. Maybe they are married.