It is not okay to bully anyone.
Jenna has just found out that her younger brother is being bullied by another kid at their school.
Jenna wants the bully to get what they deserve.
Jenna tells her parents what has been happening, so they can intervene.
Jenna re-enacts what her brother's bully has been doing to her brother to the bully.
Jenna's parents resolve the situation with the school and the bully's parents.
Jenna earns a reputation as a bully herself so people continue to target her brother.