

Oh this is a cool perspective. In a different setting I know of groups that had dedicated people as points of contact for newcomers. I think they had a specific outfit that marked them as the person to go to to get introduced to the others and the idea really stuck with me because I think it really creates a more welcoming atmosphere for newcomers.




Realistically I wanna say that your last paragraph sounds perfectly worded to broach the topic with her.
It tells her that you do not fundamentally want to isolate her, that she should be able to talk about stuff with friends but that you want some things to be private or at least have a say on how or if something gets discussed with friends.
Maybe try to frame what the deciding factor is to make something private for you as well?
Maybe something like this, if it fits what you are feeling?
But I think discussing it is the right way forward and I know how hard it can be to talk with a partner about stuff like this.