One foot in the grave?

What grandmas talk about in the back seat of the car on a long drive:

Grandma 1: "Isn't Wilma dead?"
Grandma 2: "Well, her yard looks awful pretty if she is."
Grandma 1: "I think I read that she died."
Grandma 2: "I saw her yesterday. She's not dead."

--a little later--

Grandma 1: "Isn't the tag agent dead? What was her name?"
Grandma 2: "Jo, and no, she isn't dead. I just saw her too. She's dried up, but not dead."