Is it okay to ask a sex worker if she'll offer something not listed on her site offerings, or are they pretty set in stone?

I’m a woman who’s currently questioning my sexuality and looking for a safe way to explore it. I’ve considered hiring a sex worker and found someone who offers a one-hour session for $500. I’m wondering if it would be appropriate to ask whether she’d be open to a shorter, half-hour session with an alternative activity, like a lap dance with some light touching, rather than full sex. I feel like that might be enough for me to gain clarity, and I’m not in a position to spend $500 right now. I’ve seen less expensive options, but I’m not feeling attracted to them.