Chaplin Christmas

Unlabeled family photo, believed to be: L-R: Grandma & Grandpa McClintock (parents of Dorothy McClintock Chaplin), Dorothy has hair wrapped 40s style and holds son Mack, son Bob stands to her left, blonde toddler being held in front row is Saxby Chaplin, II. Appears to be unwrapped packages around so assume this is Christmas Day and estimate year on ages of Dot and children. Mystery. Appreciate any identification assistance.