This came up a week or two ago. The aunt is the policyholder, you are just a named driver on your aunts policy. As soon as the policyholder dies the any car insurance they hold is void. If your Aunt passes her policy is void, including you being her named driver.So you need to arrange a new insurance policy before you drive her car again. That gives another problem,on her death the car is also no longer hers but part of her estate.It will be 'part of her estate' until it pases to whoever she leaves it to,or it is sold.