It depends on the police in your area. They may try and pick her up after she leave work if you can tell them where and she will be driving. They also may decide it is not worth their time stake her out for driving on a revoked license.
If you call the Police they may charge her based upon your statement but they will need you to testify in order to convict her. If you provide them with enough information they could sit at her work or home and watch to see if she drives then they won't need your testimony. If convicted she will face mandatory incarceration.
This information does not create an attorney /client relationship and should not be use or relied upon to make any decision in your case. Only consultation with your own attorney can provide you with the advice you need for your case.