Never Kiss a Man in a Christmas Sweater (2020) on Netflix

Plot summary

Maggie O'Donnell teaches second grade and gives much of her time to volunteering, which leaves little time for the painting she wants to do. Her preteen daughter Ellen will spend the week before Christmas with Maggie's ex-husband and his new wife, so Maggie faces her first Christmas morning without her. Her holiday volunteering is at the Christmas camp at For Pine Army Base, where many attendees will be without one or both parents stationed overseas. At a playground, Maggie sees Lucas Cavelli minding a boy in an ugly Christmas sweater and takes him for the boy's father; he is the uncle. Lucas, a New York City architect on sabbatical, planned a short stop in town before a ski trip to Aspen. A mishap Maggie causes delays that trip until after Christmas, and she persuades him to volunteer at the camp.