Whitt, who was taken to Miami Valley Hospital for serious injuries, died Aug. 28.
Church was traveling with four passengers. Neither Church nor any of them was injured.
The sentencing judge suspended all but the 11 days of the 90-day sentence given to Church. She began doing her jail time Tuesday.
The suspension depends upon her good behavior for two years. The court also suspended the woman's driver's license for two years, ordered two years of unsupervised community control and fined her $250.
Church’s plea avoided a criminal trial, which was scheduled to commence Tuesday.