My mother told me that when I was a few months old, they were visited by my father’s sister and her husband, who had two children, 1 and 3 years old. My mother and my uncle had opposite views about whether babies should sleep on their back or their stomach (I forget which one had which opinion). My mother would put me to sleep one way and my uncle would go in and switch me to the other way, then my mother would go in and switch me back...on and on. They lived in another state so I don’t think it was a very long visit.
Your mother must have had the patience of a saint to not go mama bear on your uncle.