The grandmother is a manipulator. The first thing that the readers learn about her is that she doesn't want to go to Florida because she's got relatives to see in Tennessee. So the grandmother's seems to be selfish, and tries to satisfy her selfishness by manipulating people. She always wants things to go her way. For an example, against her son’s wishes, she brings her cat along in the car, and ultimately causing the wreck that leads to the family’s deaths.
The grandmother is a manipulator. The first thing that the readers learn about her is that she doesn't want to go to Florida because she's got relatives to see in Tennessee. So the grandmother's seems to be selfish, and tries to satisfy her selfishness by manipulating people. She always wants things to go her way. For an example, against her son’s wishes, she brings her cat along in the car, and ultimately causing the wreck that leads to the family’s deaths.