Can a family member use the 25% cash discount if I make the reservation with my membership? This is for a honeymoon and I would like to try to save the couple a few bucks.
That is correct, the member must be in that room per the rules. Of course if the member is along and not in that room, I doubt DVC would know or care. edited to add: I see Diane was faster than I.
You could rent them your points and book the reservation for them, or if you don't have points available, it might still be less expensive to rent points from another member.