I am not BU but WHY when you ask them to do something and they sigh and moan, you ask them to do it properly and they roll their eyes and treat you like an utter nag and rush it and don't do it properly then you get them to come back to do it properly and they behave as if you are treating them like slave labour 

DD (16) has just said her and her brothers (13 & 18) do ALL the housework.
"ALL" is empty and load the dishwasher, fold clean washing and keep rooms tidy (this is rarely adhered to) occasionally (once a month) ask her to clean bathroom sink.
ARGH?! Am I alone? 