I get it. She is 86, she won't give up her keys or her Cadillac DeVille.
But, holy shit, people! At some point, you need to realize that grandma is 86 and can't frickin' drive anymore. She is a deadly weapon. Take her keys. Take her keys. Take her damn keys!
The worst part to me is that her ADULT granddaughter was in the passenger seat next to her, while Danger Grandma went careening through a bike store AT FULL SPEED!
I am all for letting grandma drive until grandma almost kills a whole bike shop full of people.
At that point, grandma gets locked up.