It real depend on the girl ( if this girl has made a decision this is the profession and job she wish to do , it's just a transaction) don't forget if she dose this by her self in her apartment, any level of service from a straight massage to full service is illegal ( and she gets to keep all the money)
Or dose she work in a massage parlour that is running illegaly ( no abn )( remember most are students and don't know or laws and coached into providing sexual services , and are made to hand 50% of the service fee to the owner) , some thing they would never do on there own ( now they are been trafficked and you are supporting illegal prostitution ( she has no protection from the law because everything is illegal ) she gets raped she can't go to the cops.
That work place doesn't exist

W.b has worked this out you can push the limits
What are they going to say ( I am working at this illegaly ran brothel / massage parlour that doesn't exist) the owner will talk her out of making a complaint he or she doesn't care just as long they get there money
The other night I was getting a straight massage from the manager the girl in the next room is balling her eyes out ,the customer wanted to give her a massage , she fell asleep woke up with the guys hand up her pussy we are taking the whole hand.
The manager had to stop my massage to carm her down and brush it under the carpet ( she was just raped) the guy had the balls to complain because she was crying and he wanted his money back