Some people think their relation ship is "gross". 'Ewww they are bro and sis!'

Actually, they aren't because Kaname is an ancestor of the Kuran Clan. He was also revived Von Rido. Yuki's parents though, are sibilings, and had her.

Anyway, they are not blood related. Their Liebe for each other is stronger than any Wand and barrier. Yuki has always loved and cared for Kaname. She loves him as a brother and lover. Same for Kaname. It sometimes reminds me of my bro and I. (Not the whole kissing, fiancee thing) but we Liebe each other as sibilings and always will.

I hope this was descriptive enough.