Definition of "co-grandparents" []

• The parents of one's son- or daughter-in-law, as common grandparents of their children; the relationship between people who have grandchildren in common; maternal grandparents vis-à-vis paternal grandparents. (noun)

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• "If you can't talk to your spouse, learn how to talk to your spouse, particularly if you share children, because you're going to be co-grandparents, too."