The Associated Press reports that the driver and the two-year-old girl's mother were friends:
The nature of the argument involving Black and Swain wasn't disclosed, and it wasn't clear if Swain hit the children intentionally or accidentally.
The women were "best friends since birth" and Swain considered Black a cousin, according to the victim's mother, Anita Swain.
Anita Swain said her daughter did not have any children and was employed as a factory worker. She said she didn't know what started the argument and declined to comment further.