I too got the impression that you were annoyed because she didn’t want to satisfy you when she herself couldn’t be satisfied. But I felt like the annoyance came more from the fact that you spent money and felt like she owed you. Obviously some form of sex is expected on a weekend away.
I think that if this was a relationship, you would have a right to question whether she is meeting your needs. Like what a loving partner she would be if she made sure you felt good when she couldn’t. And she could look at how you treated her. Like if she wasn’t feeling good, were you ok with that?
My point was more that - this isn’t a relationship. It’s a FWB. So it’s viewed different. Both partners are going in knowing they don’t have to give. It’s supposed to be mutually beneficial. But the trip doesn’t pay for sex. Or else it’s monetary exchange. I guess the sex act pays for the sex act in this case. And no one got anything. But on a different occasion (no menstruating) it could still resume as a no strings exchange. But expectations beyond that can’t be brought to the table.
I think in a relationship with love and passion, she would want to do that for you and you wouldn’t think twice about spending money on her because it would make her happy