im desperate to get her into swingin , want a goodlookin charmer to seduce her n make her see how good it can be

I take it you've discussed your fantasies with her? Or is part of the fantasy, her being oblivious to the situation?
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"The tighter you grasp Lord Vader, the more it will slip through your fingers."

iv hinted alot and she acts very conservative and wont agree to swingin but i knw she loves male interst and dresses to please so shes seducable but wont do it infront of me

Seriously?

couples usually go into swinging, as a mutual desire to explore things sexually.

I think your pushing her into swinging is more a case, of you want your cake, and to eat others too.

For me there is a whole world of difference between dressing to feel good, and having men look at me and swinging!
Having her 'seduced' by someone, well, will that not say more about the trust in your relationship than about her dispostion to swinging.....

Buy her hammock for the garden as a try-out...