Well, if she feeds on emotions, a professional sex worker probably isn’t going to be a good source. They would most likely be acting, so while it would feel the same to a human, not so much to a demon that feeds on emotion.
Also a sex worker is likely not as easily flustered as a normal person. And to get the same emotion simple harassment would get from a normal person would likely require actual sexual assault bordering on torture.
Those fake burgers look like real meat but they just don’t taste the same and don’t have the same nutritive value either(yeah plant based is probably healthier for humans, but still “more healthy” is a “different nutritive value” than “not healthy”)
My suggestion would be: The demoness needs the credentials to run a support group for “fustrated sexy maidens”.
I mean, the obvious thing would be to contact a sex worker. It’d be like a take-away order for a succubus.