Kailyn Lowry was taking her 1-year-old son Isaac home from day care when the crash occurred Tuesday evening in Lower Nazareth Township.
Lowry tells The Morning Call of Allentown that the driver in front of her stopped short. Lowry says there is no damage to the other motorist's SUV but "my car is totaled."
Lowry is one of four young mothers featured on the MTV show "Teen Mom 2."
Colonial Regional police are investigating the accident.