Just as an update, and for anyone that might be in my position..
We're staying at the Grand Floridian in a villa WITH our friends who are DVC members.
It was stated by a couple of CM's that guests of DVC members are not entitled to the park discount of buy 5 at the price of 7, if they don't actually live with the DVC members.
However, my friend called DVC direct yesterday and they allowed him to buy the same tickets for us at the DVC discount....we are not family, and do not live together.
The CM stated that as long as our group isn't over 8 people, and we are a part of their reservation, they allow it.
So while it states clearly that only family members "living in the same household", I guess they are lenient with this when it comes to family and friends actually travelling with the DVC members.
I can see if this was being abused by people who might have rented DVC points from a friend or even stranger.
Just figured I'd pass this along.