Debbie Macomber's A Mrs. Miracle Christmas (2021) on Netflix

Plot summary

Laurel and Will McCullough have spent years trying for a child, and the bills for fertility treatments sent them to live in the Seattle home of Laurel's grandparents, Helen Atwater, known as Nana, and her husband Pop. A foster child, Jonathan, nearly became theirs before his birth mother kept custody. Pop has recently died, Nana has lost her joy of life and sprained her wrist in a fall, and the couple, short of money, decide to hire someone to keep her company through the Christmas season. The agency has nobody free, yet Gloria Merkel turns up at the door without notice, a woman whose glass is always half full and who was once called Mrs. Miracle by mistake. Nana wants nobody fussing over her.