Biggest Loser continuation

***Spoiler Alert: Watch last night's episode before reading***

What is Amy thinking? Seriously, what good is it going to do her to keep Vicky on. Vicky would never do that for Amy, especially since Amy voted off Vicky's husband, Brady. This was probably her only chance to vote off Vicky and she blew it. It made me so happy that the challenge came down to Michelle and Renee. When Michelle told her mom that she would buy her a purse if she let go, it made it sound like she was going to take the money. Then at the weigh in when Michelle decided to do the 1 pound disadvantage to Vicky, it almost seemed like she did it for Amy. That 1 pound disadvantage was huge, it put her below the yellow line and up for elimination. Michelle knew Amy would have the swing vote and that she had a miserable week because of Vicky. This was the perfect chance to end it all. I am sure Amy is afraid of Vicky, I mean who wouldn't be, she is psycho. But if she voted her off, she wouldn't ever have to see her again. Amy might have been afraid to face Bob to tell him he voted off another member of the blue team, but I know Bob would have understood. He was really on Vicky's case so he would have seen that it would have been Vicky's own fault. Amy had nothing to lose to vote off Vicky. At the beginning of the episode I was really cheering for Amy and wanted her to win it all, now I am not so sure.