Sandrine
When Julie confronts Sandrine in the ladies room, and Sandrine has this smug look on her face while expressing fake disappointment that Julie will now hate her dead husband as well as her, I so wanted Julie to show how strong her pimp hand was right at that moment. To top that off, Sandrine then proceeds to smoke even though she's quite far along in her pregnancy. Julie tells her she shouldn't, and Sandrine flashes a "yeah right, whatever. you can't be serious" smug look at Julie.
What a terrible, selfish, annoying person. Julie would have been well within her right to slap her around. Julie should get some kind of award for showing so much restraint.