User blog comment:Animeangel1998/Half Vampire Half Werewolf/@comment-2070074-20100920174519

If a vampire male mated with say, Leah Clearwater (once she'd stopped phasing and her periods had resumed), the baby could theoretically be half and half. But the vampire genes would probs trigger the wolf ones, so you'd have a huge, virtually indestructable stone wolf with poisoned fangs and a thirst for human blood. Not all that great when you think about it.