The phrase "member of the sandwich generation" refers to a person who is taking care of children and elderly parents.
Is there a phrase (or word) for a person who is taking care of parents, children and grandchildren? Or grandparents, parents and children?
Example: Alice and Tom are members of the ___________ generation; they are taking responsibility for her grandmother, his mother and their three young children.
Edit in response to comment of dwjohnston:
I have not seen an article about this phenomenon, but that doesn't mean there aren't any. I have seen this referred to several times in articles about the sandwich generation (SG) as an extension of the SG problem. As more people live into their 90s, this will become more common (although one hopes not of long duration for any one care-giver.)