Have fun I'm sure there are plenty of locals who love fucking a vacationing white wife down there. Some where I read you should get a black guy to give her a massage and see where that leads too. Does your wife want black island cock?
Talk with couples online who have been there for the same reason, they will tell you the hot spots. Search for the three Hedonism resorts. As far as I know, all she needs is to go topless/nude on certain beaches and many black men will flirt her.