Curious about what you all think of discreet cucking?

Sorry if I explain it poorly I'm very dyslexic.

So I have a weird more specific form of cucking I like and want to know if anyone else thinks it's a bad idea or not worth even looking into. I really want a more discreet form of cucking, my girlfriend has always been heavily into older big strong manly men who will treat her like a toy. But she's never had this before I'm her height can't pick her up and do stuff she's into and I'm very gentle and soft and try to be more rough but it isn't me. She says I'm by far the biggest she's ever had but damn Ive seen my fair share of other mens dicks and there's MONSTERS out there. We still love each other heavily but I want her to be able to experience what she's really into still. But for some reason giving her permission to ...... with a big hung manly man I know would make her feel like I don't care about her anymore, plus I feel weird and not into it just saying that to her. So I have been imagining for a bit now finding this big hung older manly man and giving him notes on how to talk to her and get her attention and he text her asking about hookups and trying to convince her to cheat on me for a hookup. It would help her not feeling unwanted by giving her permission and also getting her desires out if she agrees to it. Plus for some reason the idea of her willingly cheating on me behind my back is way more of a turn on to me.