Tell her to rent a car by herself because...

She bought ticke without asking you.  Every help has some kind limitations. 

I have simular case that my cusion who fly from LA to Washington DC.  When she arrived at airport asked me to pick up and send to DC hotel.  That's day in winter and snowing.  I said "No".

If you got car accident that you will have no peace for months.  Someone who only care of herself.  Who cares? 

Rent a car or call taxi.  You have no abligation to provide free service.