The feet on the dashboard thing always annoys me. What happens if you hit something?
Still, that is something you can deal with.
Someone who would bother to complain about being given a free ride in a Porsche is clearly someone you will be hearing A LOT more complaining from about everything else later. Ditch her. Life is way too short to be with a disagreeable woman. A good woman will respect your passion for cars and driving even if it not her thing. It took me many years to find the right girl, but as soon as I did, I married her.