Thank you!  I've seen several stories in which the Dursleys are kind of caught-in-the-act, but I'd never seen one in which one of the Hogwarts teachers find out during the school year.  It was a rather obvious (at least to me) angle that hadn't been exploited yet.  I chose to set it during OotP because it seemed to me that the absolutely logical way for the abuse to be discovered was during Occulmency lessons. 

 I took the classes dealing with these kinds of laws and the effects of long-term child abuse as an education major a few years back.  I realize that the reason why JKR has never dealt with the issues she's raised by the Dursleys' treatment of Harry is because of the genre that she's based the books in--she's working from the classic boy-hero mythos.  As an educator herself, she'd be more than familiar with the law I'm exploiting for the purposes of this story.  

I'm very glad you're enjoying this, and I hope you continue!  Harry has a long road ahead of him, and I'm not just speaking of Voldemort.