Personally, I think she is a bully towards those girls ( 1 more than the other )
Remember her kicking off over the spilt pasta pot in her college bag ~ in fairness, she did her best to clean it up with what she had to hand.
Yesterday, after baking, 1 was heard to say " No mess either mum "
Today isnt the 1st food shaming shes done either, rules are rules, I understand that and I know LOTS of people dont like food upstairs ( it never worried me tbh and I still love a cup of tea with biscuits in bed or breakfast on a weekend ) but its not as if they are obese and sneaking food, maybe their bloody hungry??
But like someone else said, give them some privacy ffs . . They're soon be 17!!