That's the reason for you. I'm not trying to stick my dick into an unwilling hole, that is the opposite of what I want. Just because you paid doesn't guarantee that she enjoys everything you do. Being indifferent to what's going on with them isn't something I can do.
The math doesn't even make sense either. If I'm having great sex with someone, multiple times a week for weeks and I have one weird incident, it makes no sense to throw all that away bc of one bad session. You're taking a bigger chance with some rando than the person you KNOW you've had long-lasting chemistry with.
However you position it, not trying to resolve or move past it is, well... it's a decision alright.
Unwilling? Then reject the client. No harm, no foul, try again another day. And I love the mental acrobatics to spin rejecting bad service to rape, and
yes, you are positioning the argument that way. This is a service. You can be friendly, you can care, but at the end of the day, this is SP-client, be professional.
Resolving or moving past it is certainly your choice. Not saying that's not a viable option. I certainly have looked past some bad encounters and tried again. If you feel it is worth it, go for it. But for $3000,
well... it's a decision alright