Do i give up on my young gf?

Been trying to slowly turn my gf (f21) into a hotwife, with different tactics, being gentle and slow, but it looks like its not gonna work. Its my biggest fantasy, and i dont know what to do now. Will I be able to push trough the relationship without ever trying it? Or will it always be in my mind until I cant take it anymore? Or is there still a chance?
 
Been trying to slowly turn my gf (f21) into a hotwife, with different tactics, being gentle and slow, but it looks like its not gonna work. Its my biggest fantasy, and i dont know what to do now. Will I be able to push trough the relationship without ever trying it? Or will it always be in my mind until I cant take it anymore? Or is there still a chance?
I think the biggest challenge is for her to realize that it's okay for you to see her with another man and that the traditional societal view no longer prevails as much as it once did...