Originally posted by MooKu:
Aye for goodness sake.
If you're confident, as suggested by someone above, take her for a spin and show her you're capable of driving competently, safely and SANE-ly.

Then, whenever you drive her car, take it for a wash or something. Just take good care of it and make it look noticeable so that she can grow to let you drive it more!
i think the best advise so far. gotta be smarter than that. wanna use other ppl's things, must reciprocate. top up petrol, wash, leave niceties in the car for her like mints, etc. all helps her 2 b more accepting. share the running cost of the car. if u cannot afford those things, stick to BMW....
becos the car is ex no matter how u look @ it, even a piece of junk is the apple of the eye to the owner. when u hv yr own ride, you'll know.
also, dun borrow unless necessary. dun tk it for granted...