A grandmother was arrested Tuesday for driving around the parking lot of a Marathon, Fla., grocery store with a 3-year-old child sitting on the roof of the car, authorities said.

Monroe County Sheriff's Office deputies were called to the Publix store Tuesday and arrested 54-year-old Brenda Bouschet after she was driving around with her three-year-old granddaughter on the roof of her car.

Bouschet was released from jail 15 hours later.

Bouschet said Thursday she would never let anything hurt her granddaughter. She says she was driving at "snail-speed" and holding the child's leg.

Bouschet told police she was giving the child some air and letting her have fun, authorities said.

She faces charges of child abuse. The child is back with her mother.