Fill in the asterisk yourself.  

This flick addresses the whole “barely legal/stepdaddy/school girl” subculture of the porn industry.  Seriously, it’s somehow ok to depict an older guy engaging in sexual acts with a girl wearing pigtails and a school-girl uniform because it says “All actresses are 18 and over” stamped across the back of the box. But at the end of the day you’re depicting some sweaty dude having sex with a girl who’s portraying herself as a 14 or 15 year old.

So unfortunately, the whole Little Sister thing (AllActressesAreOver18soIt’sOk) would translate well into this genre.