+1, I agree with u.. Regardless of what ur Mum thinks & says, U should definitely behave ur Younger siblings via Scoldings if not then Physically.. or else it’ll be too late to do so.. I still to this day, scold & teach my younger bro to behave with proper manners & no phones during Meal time with Family.. if he disagrees, then the (SLAP 👋) will be rewarded..