The question has come up. I know each individual can receive $14k tax free each year. AFAIK, that means that Pixy, her husband, AND ZB could each claim $14k as a gift. But I also think that's FROM an individual. I don't know if the donations are seen as being from an individual or what.
I am NOT a tax expert, so hopefully someone else knows something.
It is my understanding that No tax implications for the receiver of the gift - tax implications are for the giver if giving over a certain amount to one individual.