She was operating a motor vehicle. It's the law.
§ 20-29. Surrender of license.
Any person operating or in charge of a motor vehicle, when requested by an officer in uniform, or, in the event of accident in which the vehicle which he is operating or in charge of shall be involved, when requested by any other person, who shall refuse to write his name for the purpose of identification or to give his name and address and the name and address of the owner of such vehicle, or who shall give a false name or address, or who shall refuse, on demand of such officer or such other person, to produce his license and exhibit same to such officer or such other person for the purpose of examination, or who shall refuse to surrender his license on demand of the Division, or fail to produce same when requested by a court of this State, shall be guilty of a Class 2 misdemeanor.