You've planted the seed but it sounds like you are pushing her really hard to swing with another man. She is either into it or not. If she is into it things will unfold with time, and if not, prompting her will not change the outcome. She has told you "stop fishing for compliments and that you are silly when you try to prompt her based on your endowment, but you just aren't getting her message that is to stop talking about this and that you're being silly/annoying. I suggest having a few drinks with her and telling her that you like the idea of a MMF experience with her and that if she is curious about this that you would like to try it with her. I hope my advice helps you