If she truly does have the funds (Some people are impulsive, they really are but cannot afford such 'giving' of money long-term.), accept the gift.

But go to the get-together with some food/dessert that you have made to share with others. Or other stuff that you can make in advance to share with others. Get DD involved to help out too.

or burn DVDs of digital photos for everyone.. that records the event.

I no longer assume that everyone is "rich" /has alot of funds their whole lifetime. Not anymore. Too much evidence, otherwise.