There is never any mention of grandparents/aunties/uncles/cousins - and they must have SOME relatives!
Possibly not. Wasn't Aud adopted? She could have been an only child in that family and might be estranged from any cousins. Phil has the brother in New South Wales, just up the road from New Zealand, and that could be it. If there is any family, they probably don't want anything to do with P,A,S and Em for the same reason they don't have any real life friends. Just sayin'.