Now, I am sorry I left this out, but it was for the protection of my little were cub, who also happens to be my little sister.
When two vampires have children, only one child will be able to turn into a vampire. The gene selects the most compatible host. It is not necessarily the first child either. For instance, I am the third oldest in my family, and the one who got the gene.
The same goes for werewolves. Only one child gets it. Like my little sister.
In mixed families, two children get the genes, but they separate into the most compatible hosts. Me and my younger sister are perfect examples of mixed relations.
Here's the deal.
My great uncle on my mother's side was a Nazi werewolf. He turned fully, but the gene became diluted since the family didn't breed with other weres. My mom is a carrier. That is why her eyes are hazel, instead of brown like her brothers and mother and father. The passed the highly diluted gene onto my little sister. I was keeping it a secret, since I hoped it would be so diluted as to not matter, so that she would be safe. But when she came of age, I noticed the signs. I told her what was up the last sunday in March. Since then I have been teaching her all I know about werewolves, but being a vampire, my knowledge is limited. So I better introduced her to the other were at my school who came of age last year.
My vampireness is from my father and his father, and it waas nearly potent enough to turn me full naturally. But not quite.
So that's what has been bothering me, and that's why I wouldn't answer someone's question. I wanted to protect my sister. But now it is time to be known. But be warned... If anyone tries to mess with her, I will hunt them down and kill them. It is my sister, and I shall not have her become someone's pet.