Hol' up... they are still siblings by law and he is her guardian. In Japan guardians can marry their subject? (@0@) mind...BLOWN!
Also i am so tired of this "blood related" bullshit. Being sibling is not just about sharing the same genetics. It is all those years of cognitive and emotional development that you share. Humans bond and define the type of their bond mainly based on the context and time. If you were raised as siblings and felt like siblings (which was the case here before she knows the blood line story), then when u end up loving ur brother, you are simply loving your damn brother. Stop making excuses to justify it with the blood line what not, ffs!
Six Half