Grace's elderly grandfather living with her family. He initially appears missing, prompting Karen to join a search, but it turns out he simply moved to a retirement village. Karen forms a close bond with him during the swap.
Karen and Papa Tognetti form a close bond during the crisis of his disappearance.
Grace and Papa Tognetti are related as grandmother and grandfather within the family unit.
Explore the full interactive character relationship map of The Great Mom Swap