Can you describe save Tamara or follow Pixie a bit more?
Are you referring to the choice during the assault on the Initiative where Billy, Pixie, Tamara, and a third woman (I can't recall her designation: she has 3s in her name rather than Es) with a variant form of Kinesis attempt to enter the building and then split up when the mission goes pear-shaped? If so, then you're done. That and the debriefing by Maid Manners, Karma, and Terrorstrike is the end of that plot line. The only thing left is graduation.
If instead you're describing Tamara meeting with the black car before the club is formed then there's still something to dig into.