Quote Originally Posted by Devil Shroom View Post

This is probably completely wrong, but:
I think that, Yuna's mother was Al Bhed (which is what most think) and Rikku's mother was her sister. Cid is still her father but he was married before and this is when he had Brother, so Brother is Rikku's step brother.
Yunas mum IS al bhed, but rikkus mum is not yunas mum's sister, cid is yuna's mum's brother... *deep breath*