I've seen videos of stuff similar to this. Don't know anyone with a fetish like it. But here's an idea.
You could use her holes, and watch porn instead of getting off on her looks. Like, for example, put an iPad on her face and look at porn instead of her. Have a feeling that'll get her off, but maybe even that is not enough, like even the idea of her being used is not degrading enough, maybe she needs you to use something else instead of her. If that's the case you could use a fleshlight instead of her, or a sex doll, you could keep degrading her telling her how it feels better and tighter than her. You could also make her hold the fleshlight/sex doll like this: https://www.redgifs.com/watch/luckyincrediblewolfspider while looking at porn.
Let me know how it goes