If Miyuki marries some other man, how would Tatsuya really feel? I know his emotions are extremely suppressed but I was wondering how emotions like jealousy or longing work on him when it comes to his sister. I mean he is not a dumb guy. He must know that if Miyuki were to marry some other man he would spend less time with his sister. Also doesn’t it bother him that some other man might be able to have sex with Miyuki?