1. You focus only on who and what she is to you; the other stuff is irrelevant.
2. You accept the fact that she does what she does for a living. If you can't, you better be prepared to support her financially, to the standard to which she has become accustomed.
If you can't do the above, and you have that image stuck in your head, it won't work.
Even if you can do the above, you hope that she:
1. Keeps something special that is private and exclusive only to you.
2. Is honest and open with you and does nothing behind your back. (e.g., she sees guys in hotel rooms for sessions, but doesn't sneak around having dinner with them or seeing them off the clock)
It's all about trust. Once it is broken, you're fucked. That applies to any relationship. But, industry relationships are doubly fucked. These girls are actresses and they are pros at manipulating men. So, distinguishing between real and not is pretty well impossible. The best advice is to simply watch what she does rather than what she says. Words are cheap. Excuses are plentiful. What a person does is what counts.
If you find yourself making excuses for her to assuage your own feelings, or you find yourself doubting every word coming from her, it's time to pull the chute.
(p.s. look at it like a trip to the casino. Don't put on the table any more than you can afford to lose.)