Thank you for this information.
Yes this is is indeed both a criminal and civil offense.
The use of your girlfriend's picture is both defamatory, and an invasion of her privacy which can be sued upon in civil court, where she can seek monetary damages.
She can make an immediate demand to the websites to have her picture withdrawn from those sites. The sites should comply with her demand.
As far as this is a criminal offense. Prostitution and solicitation are illegal and should be reported to your local police station and the District Attorney.
Identity theft, the use of your girlfriend's picture to advertise these services is also a criminal offense.
Once these crimes are reported to the police/ DA's office , it is up to them to criminally prosecute the person responsible for posting these images.
In the meantime, I would suggest that your girlfriend contact facebook and the other sites to immediate remove the images.
If you have no further questions, PLEASE RATE POSITIVELY, before exiting.