That's a common misunderstanding, actually. Even families that have werewolf genes can have human offspring, so, you could have, like, three children where two are wolves and one is human. And all of them are members of the pack, of course. So...

[ he shrugs, hoping the explanation makes sense to her. ] You can have human members in the pack, whether they're family members or not. In ours, I'm the only one who's human. [ his mouth draws into a line at that; less because he'd be annoyed by the fact, and more because... there used to be another. but she's gone, now. ]