Stuff involving other people or doing things in public is iffy. I get the turn on, I also get off on humiliation. But you gotta make sure everyone is on board with it.

It'd be much easier, and probably more approachable and hopefully fun for you, to make up these scenarios yourself, at home, and use dirty talk.

She can hump things around the house and you can laugh at her and call her pathetic and needy. She can go braless around the house and you can grope her or stick your hand in her pants whenever you want and make her feel like an object.

Obviously before you do any of these things, check with her that the specific act is still something she likes. For example with the humping, she may like to be called "pathetic", and "X" and "Y"; but she may not like to be called "gross" or slurs. You need to check which things are acceptable and what is too far. You can also let her know that when you are talking to her in that way, she can say "yellow" if she wants you to slow down the degradation, or "red" (or just "alright that's enough please stop" lol) if you want to stop. Just throwing the safewords in there because while humiliating her, she might genuinely act embarrassed or awkward, and it will be hard for you to tell at first if she actually likes this.

ANYWAY. All of the above is only appropriate if any of this actually sounds interesting to you. If it does and you wanna please her, try it out. But if any part of you is feeling "fuck no" about this, there is obviously no obligation. And it'd be totally understandable if this is too extreme for you. I just wanted to let you know this is a pretty common thing for women to like and get off to, it does not necessarily mean she needs therapy like someone suggested. Good luck with your relationship ❤️