Another last minute decision
That is a great cruise - we've done that one a couple of times. The beach at where Club O was is a bit different from the last time we were there but they are still renting chairs and umbrellas. I hope you are able to convince your wife to go to the beach with you; she can be there in her swim suit the whole time if she wants to of course. And maybe, provided you don't make too much of a thing about it, she will at least agree to go there with you so long as she doesn't HAVE to be naked.
I was able to get my wife to turn right at the beach for her first-ever visit to a c/o beach. She said she wasn't sure about being nude but she would go there with me. We got our chairs and umbrella, sat there a bit then went in swimming (I was nude, she was not) and then returned to our chairs. Within 15 minutes, she had dropped the top of her one-piece suit and was comfortable with that. In another 5 minutes, she said "Well, when in Rome. . ." and proceeded to pull her swim suit completely off. After sitting there a few minutes in the all together, I asked her if she was up to a stroll down the beach and back as well as to the Club O store for souvenirs. She got up and enjoyed it very much - that was quite a surprise to me but of course I loved it. I haven't been able to get her to a beach here in Florida or to one of the nudist resorts yet; she doesn't want to be nude where some she knows might see her. lol
But anyway, good luck to you at St Martin and the beach.
Decided not to go. She likes the beaches around here the best at that time of year. We are looking to go on a cruise later this year or early next. We may try Seaborne. She did go topless at the beach for a little bit a couple of weeks ago. Nobody was around, but it is a start.