I bet Mielle and her brother were reincarnated their twin children without their memories of their previous lives. Just so the Gods can mess with them more.
I'm dropping this one, don't get me wrong, I'm all for getting back at those who wronged you but don't drag and hurt other innocent people in the process. Statutory rape of a girl in an adult body that's not yours, especially after your spiel of not wanting sensei to get in trouble for your actions. This guy deserved to be bullied if this is his true nature.