my GF is the type that absolutely doesn't give a flying shite about ANYONEs car, let alone my pride and joy, she's the type that would will bump your car in the supermarket and not think twice about it, if i had a GF that gave a s**t i genuinely would let her drive it, but you have to read your personal situation, personally i don't even like my current GF going near the thing, she's heavy handed and genuinely doesn't 'get" the car hobby thing, lovely woman but doesn't share my hobby in the slightest.