Relatives = troublesome

Suddenly feel like want to go back to my house after received a phone call from my mum.I'm really have the feeling want to protect my family from all those stupid distractions and disturbs from those ridiculous and demanding people.
However, unfortunately now I can't go back now as my final exam is just started and haven't finish.
Well, actually there is no a big deal or things happened now if my family don't really calculate on what my lousy aunty and uncle demands. But, we think it is all my aunty and uncle( my mum's brother and sister)problems to ask for those demands. Things are started to happen when one of my cousin( my uncle son / my mum niece), he is about to marry in this coming DECEMBER.
However, the weird part is that both of my uncle and aunt are asking us to lend out our new car to this cousin. But, for our concerns neither of this cousin's father/ mother or himself is asking for that demands- he want to borrow our car as his bridge car on the wedding day.
Frankly speaking, normally people won't simply lend out their new car to other people as the insurance policy is bought under first people who drive the car.
Some more , it's really stupid for us to travel 300 kilometers from TPG to KL just to lend the car to them. Not say we are selfish, but really my aunty and uncle, they are really demanding person. During the recent trip, my parents travel back from China, they said they want to buy some Hennessy. If my parents buy from the airport will be more cheaper. But,the problem is after they take those Hennessy, they don't paid us back the money.
So, is this kind of attitude of people can trust or reliable?
For us, it is really scary. How about if anything happens to the car when they use our car? People like this really no responsible at all , how can we trust them?
When they have other bad record in the past. Borrow one of my relatives car and crash in an accident but after all never give back the owner any compensations and money on the car or repair back the car.
So, in brief relatives are not necessary to be good, sometimes it can defines as troublesome especially when you meet people who always try to take advantages from you. ~~~~~~~Lousy PEOPLE with Over Demanding Without Reasonably factors.