Blood Fangs

I'm a half vampire, half Human. My mom had a one night stand with a Mortal. That's how Iwas born....um...well sort of. My twin brother Mastiff, it WAY too over protective:
HE hates Spike [Lizard's bf]
He HATES that she hangs out with pure mortals
most of all, he hates that I'm half blood.
This is where my story begins.