Tamra had told Vicki early that morning that her daughter was sick. It seems like a valid reason not to go to a party that night and to stay home with her child. Why didn't Tamra tell Lizzie ahead of time instead of Lizzie having to call her while waiting for her on the lonely party bus? It shows that indeed Tamra is inconsiderate and has no class. Me thinks that Tamra is intimidated by Lizzie's beauty, class and confidence. Not an easy target and perhaps Tamra doesn't want her husband around that beautiful, smart woman.