I think the original post was nothing like the clarification in post 68. I stand by my opinion of the original post sounding clique-ish.
In post 68 it is an entirely different scenario. I don't think the outsider can be blamed for using the joke when it and the honeymoon story were shared with her. Sharing it took it out of the area of being private. Maybe not your intention but I can see how she feels that she is now an insider to the joke. (I wouldn't, but some people may).