She is incredibly beautiful n sexy, I wish I could be the first.
If I may be so bold to suggest, be patient in your quest. Maybe start out by watching some threesome porn and see how she reacts to that. In my experience, once I saw she got turned on by threesome porn I introduced fantasies about seeing her being fucked by other men. It made for some really hot sex. I had to get it set in her mind that #1. it wouldn't cause a problem in our marriage because I totally trusted her, #2. I love her above all others, and #3. it's just sex (different from making love) and that it's ok if we share it together. It took me a few years of being patient but it paid off. For the last 20 + years my wife and I have enjoyed a sex life that most people only fantasize about.
You might want to read my intro in the "New Members" thread for a bit more detail. Anyway...didn't mean to be long winded. Good luck !!!