Lauren Holloway: The mother of twin daughters, this cashmere-and-pearls housewife has always been careful to do the "right" things in life. Erin Karmeli: Clad in tight jeans and low-cut tops, she's a vodka-swilling, straight-shooting single mother who openly admits to making all the "wrong" choices. When her husband leaves her for his "hot" yoga instructor and her so-called perfect life does a 180, Lauren is fairly certain she's hit rock bottom. But...