I haven't spoken to my mom about it yet, but I did have a talk with my sister. She and I disagree, but she said she would respect my boundaries and it would stop on her end. She thinks family is allowed to tell each other how to parent, in so few words. I told her it absolutely was not her place.
She also seems to think that raising a toddler and raising a first grader are comparable. They aren't, they just aren't.