My sister is staying this weekend. I find her really wasteful as she does things like bin half her food (that she bought), sit in the car stationary with the engine running wasting her petrol and leave the tap running while cleaning teath and we are not on a meter so doesn't cost extra.
I've said I really don't like it and she's just argued back that it'd her food and petrol etc to waste its not costing me so its her prerogative to waste them.
I don't really care who its costing its irrelevant to me, its still waste.
Aibu?