My knee-jerk response to you was going to be "just tell her, she's an escort, It's easy", but then I reflected on it and I agree with you: it can be awkward to blurt it out. There's even an element of rejection in the escort/client world just as there is in the civvie dating world. It's not always easy to bare one's soul about sexual likes, desires, kinks, fetishes and fantasies.
Here's a possible work-around from my own playbook. Before she can ask me what I want, I beat her to the punch by asking her: "What do you allow and what do you not allow?" Based on her answer, I tailor my next comment, for instance, of she names something that I want it like as part of what she allows, them I'm in. If she names something that I want it like as part of what she doesn't allow, them I know it's off the table. One thing I never do is attempt to negotiate or bargain. If she only does CBJ instead of BBBJ, I'm not going to try and convince her otherwise.
If and when she asks me first to tell her what I want or like, I'm at the point now that I just say it. Both my time and money are precious and limited, so I don't want to put up with disappointing sessions, regrets, or buyer's remorse. If I don't speak up ahead of time, only to find out later that it might have gone on my favor, the could-haves and should-haves are on me. Of course, it doesn't always work, but that's life. I won't lie and say that every escort has been great about my desires or kinks, because they're all human beings, and people have their own opinions about things. Some escorts politely decline something or simply say they're not into it, others act as if you've just suggested animal sacrifice or worse.
When it works, it works. I once had a fantastic session with an escort who blew my mind in how accommodating and eager she was, she complied with my clothing request, she acted her part in a role-playing scenario I had, she stayed in character for the whole hour, gave great service over and above my expectations. After we finished, had showered and were getting dressed to leave, we were chatting, and I made a passing remark about something else that I like In bed and would have wanted her to do. It's something out of the ordinary, a little daring and bold, and not many people are into it, so I hadn't asked for it. She looked at me and said, "Why didn't you tell me you wanted that? I would have done it gladly." Doh! What an idiot I was, lol. I learned from that tv at it doesn't hurt to ask.
Don't worry about being forward. One never knows what another person is willing to do. The last point I'll make is to be glad you're being asked what you like. Nobody is a mindreader, so if a woman who is about to have sex with you gives you a chance to call some of the shots, tell it like it is. Open communication between people who are having sex with each other is one of the best ways toward mutual satisfaction.
