How do I tell someone who spent 60 plus dollars on drinks on me, and bought a hotel room for tomorrow that I don't want to sleep with them?

She got me really drunk last night and sucked my peepee in the backseat of her car. She's cheating on someone too and it wasn't bothering me at first but now that she has bought a hotel room it feels so real. I haven't had s*x in almost a year because I've been gooning to hentai, and really I enjoy gooning more. I just feel no motivation to meet her at the hotel tomorrow, especially since she wants me to spend the entire night there. It's extra stressful because I was lying about having a job and she thinks my father's very expensive car is my own, so I think she actually sees me as a long term catch when this all started out as me just wanting to prove I could still get laid so I could enjoy my hentai guilt free.

I unironically feel pretty terrible right now and regret the entire thing.

Edit:

Here is what I will go with.

Hey, looking at the hotels and everything has made it more real to me and I don't feel comfortable with this. I'm very sorry for leading you on, I was thinking with my peepee at first, but now I can see it was a poor choice on my part to start doing this. Let me have your venmo or something so I can pay you back for the drinks.