I think you're right. From the previews of next week's episode, it looks like Steph goes on the offensive. The question is, however, whether she will be able to turn the others against Tom. The dynamics are kind of against her given that the others are all original Koror members and have had such a long time to bond and form allegiences.
You're right, but the girls were mad a Tom for not letting them use the 55 gallons of water to shower with.