I'm 18 years old, have recently bought a semi expensive car for someone my age, and my Mam expects lifts everywhere if I'm not busy. Don't get me wrong, I don't mind giving lifts, especially to my Mam, but when I rack up an extra 100+ miles a month just driving her to pointless places, it's annoying.

On top of this, she complains about my driving, and the amount of mileage I'm racking up means I'll be wasting money; yet she's adding to this problem massively (another question maybe).

How can I get out of doing so many free trips for her, or potentially getting some money for it because I can't afford the petrol money and she's complaining about my savings?