I'm not sure she'd appreciate the review, but telling her that her place made you gag would be worth it. Especially if her massage was good enough that you might want to experience it again.
Your last post about tidiness made me think of how each of us relates differently to neatness and cleanliness, and how the opposite end can seem utterly crazy. My mom and my wife are great examples, one being a compulsive clean freak, the other one an utter slob, with me somewhere in between. (And yes, both regard me as a bit weird, if not totally bonkers... but maybe I just am, regardless of how neat I keep my place.)
Interestingly, the part of your description that would have gotten me to simply get up and leave before the end of the session, were the Spotify adds! But each of us are annoyed by different things.