My Wife's Fantasy

I am originally from Brazil but moved to the USA when I was an infant with my parents when my father was transferred with his job. I married a Latina girl from Texas just a few months ago. Lydia has always been a sexual partner that enjoys different things. After a while as everyone usually does we became like clockwork, as far as enjoying sex with each other.
We had some couples over one evening for a pool party at our home, and Lydia whispered to me is she attractive to you? Now this girl has given a pair of breast with nipples standing out and had beautiful hair. What do you say to your new wife with a question like that? I answered well she is well endowed. Lyd said to me silly I don’t care but I have always had this fantasy of us in bed with another woman and watching her large breast bounce around.
Later that evening we talked the subject over and I asked if she also felt we needed something else in our sex play. I said I was surprised she said I’m just fantasizing, and besides I don’t know if I could be in a lesbian interaction. I told her a threesome sounded fun but I was nervous.
A few days went by and I asked Lydia if she would like to join me for a trip to the Bahamas. By the way I am a corporate pilot and fly from Florida to the Islands every week. We went in early on Friday and did all the prep work for the weekend flight. Some of the passengers were starting to arrive, and this one girl was very toned and built like a brick shithouse. I figured she was some sort of model, but she was traveling with one other guy that seemed gay. Nice guy well-dressed but just didn’t seem to be the partner with some beautiful girl. We all boarded and took off, the flight to Freeport was only about 1 hour so it would be quick.
I handed out drink coupons to all the guest and said we will meet around 4 pm for happy hour and everyone was welcome to join us. Lydia and I were early to the happy hour in the hotel lounge and we met James (the guy I thought was gay) and when Lydia excused herself to go to the restroom, James and I had a good talk, his background was similar to mine in that he worked for an airline.