I didn't say she would abort the mission by saying no to Connor at the casting. She has a whole team of people to her disposal. They broke in to the club to find info and they have hacked the cameras etc. They would be rather amateurish if she goes to the casting, says no to the rape, leaves and the entire Agency just says: "Damn. What a pity. We then cannot think of ANY possibility to continue. Let's just drop everything and go back to our tea.".
They would EXPECT her not to be raped, that it might not work out. And have a contingency. A Plan B. And Plan C. Otherwise they are idiots.
So a couple of alternatives for Crush:
Alternative A: He could have setup the casting so she could pass in a more realistic way.
Alternative B: That Connor for example might require other things instead (drugs, money (debt) or whatever) or that he actually might like someone saying no to him and might play a longer game for fun. I think he finds her attractive enough.
Alternative C: Make it so that the casting always is a bit undressed but she stops at at realistic point, failing the casting but then utilizing the agency's resources to find another way.
Alternative D: There never was a casting. They scout Connor out first, find weaknesses/material/blackmail and uses it (as a real agency would do). He could however require that she "models" for him, a casting if you will, so that she is not entirely useless. If he is to back her, he must know she at least will not embarrass him.
There are SO many ways he could have made those episodes SO much better. She is not a trained agent using any possible sexpionage to get info. Or have I totally misread her backstory?