I think that it's, at it's root, a small thing. You ride, they drive. They asked you to drive. It's no big, unless they make you pay for gas on top of it. Possibly your parents are at that point where they are trying to let go but having issues - its common, and it often comes out as strange requests mutating into orders.
Smile, nod, and do what you think is right. That's all this situation needs.