So far...
All women...
And as usual - they are right. The fact that you have helped your wife feel free enough to express her fantasies is so much farther than many marriages get. You need to be patted on the back for that!
But, the bottom line is, if it isn't for her, then it isn't for her. A suggestion you "might" try is to ask her to go with you to a strip club or discuss "soft swing" with her. That is how we "broke the ice". I am not saying it works with everyone because it really isn't the right thing for every marriage. If it doesn't, let it go. There will be opportunities down the road to talk about it, but in the mean time, just sit back and enjoy the marvelously liberated woman you already have! Lots of men don't have wives that get as wild as yours does - lots of wives don't have husbands who make them feel comfortable enough to express themselves.
You have a good thing. Don't monkey with it...
Spoomonkey