I (M14) have a sister (F10) who goes to the same school as me so she naturally encounters same people as me including my classmates, I'm currently not going to school because i got stitches in my head yesterday but my sister is. When she got back from school today she told me that my fuckass classmates told her that: I'm having a girl over and fucking her, I am in trouble for beating someone up (I'm not but after this I might be), that I raped someone and that I lost all my money. I know it's childish but I honestly have no goddamn idea how to deal with it because i will not allow some degenerates to tell a child younger than them about sex. I'm not looking foreward to beating someone up, I just need your help to what should i even do in this situation
ps. sorry for poor English its not my first language