I think BlackJack is trying to tell you to get a real job..u f*in bum.....instead of living off the avails of said SP..etc.
In reality, there's nothing you can do to protect them once in. Legally, you can't arrest/apprehend someone for a crime they have yet to commit right?
It's the same as the cops can't do anything either.
More than anything on your defense, you provide the security that you are "watching" and the client knows technically he/she can't get away with any "funny business". I think it prevents most creeps from doing anything which for the most part is good enough.
However, the true pyschos do not give a shit and those you can't do anything about period except do a citizen's arrest but by that time..again it's too late.
It's not the most glamorous job seriously, and being available 24/7 to drive them around town and wait in a car is seriously sounding like a really shitty job. I can think of a million other things I could be doing. Like the girls, the money has to be decent to continue.
The concept is sound and just like any type of business out there, there are opportunities for someone to be taken advantage of on both sides.
It's a messed up world out there, and in the end it's the girl that's risking it all....
THE ANSWER TO THAT QUESTION SIMPLY PUT IS:
DO WHATEVER IS REQUIRED TO PROTECT THE LADY!!!
Sorry my friend, details I can not provide however.