That smile at the end. I don't like it. I really don't like it.
I get the feeling that Sensei, upon deciding that Fumi was a "normal mother," decided to tell her about the bullying and the specifics and she probably heard about the prostitute thing too and she's putting the pieces together and comparing him to his dad now.
Shits going FUBAR for my boy and fast. I just hope Fumi hasn't gone off the deep end. Maybe we'll get some info on his dad though.