Kamikishiro said: What the hell happened since I stopped reading it? Isn't she his AUNT!? I believe this is a form of child grooming or something. Ugh!
This is just like that the manga Otaku no Musume-san. And people tried to justied it with the excuse that 'they're not having sex' or 'she's of legal age'. *Oh yeah, THAT makes it okay and not at all creepy.*
*sarcasm*
She isn´t blood related, read the manga. By the time she "confess" her feelings she is 16 years old and two years later they decide to go on with that kind of relationship. Personally I don´t think it´s that bad as long as they are happy with that and the way it seemed at the end I think they were (sorry for the bad english)