If the FSEB found out about Jenna things could go very wrong. They would catch her and terminate her. Which is why Jenna has to keep a low profile.
Jenna found out that there were backups of her and Kara and Locke's memory. She had to find it and destroy it before it gets reported to the FSEB. It was found her parents closet so she destroys it later.
Jenna's friend Ally's is sick and dying. Ally's parents beg Jenna's family to help keep Ally's alive. So they bring up the Bio-Gel and eventually save her life.