Update on my car

Its still working petrol light is on and petrol meter empty but there has to be some petrol in or it wouldn't move. Got flat front tyre on drivers side so hoping to get pump with meter on saying how much air is in then see if it stays up. I've washed it and cleaned inside and been starting it up daily and reversing and forwarding it on my drive. My mum keeps telling me to leave it alone and says my car is cleaner than the house lol. I got her sat in it and she said don't move it but I reversed it a bit she looked terrified she doesn't trust me no idea why.