So you’re still going on the cruise?!
I love how your wife was so do trite but not going on the cruise with them so obv not an option to her 😂 or you it seems.
And you plan on cutting them off when you get back? And hope you don’t see them again?
Do you feel you have any control in this situation whatsoever? Why go? Why hope you don’t run into them again when you return? - don’t see them again!
Is your wife below average intelligence? You must assume so if you believe she doesn’t know what was going on. She may not have realised how bothered you were by it it you kept your feelings to yourself but she can’t reasonably expect you to believe she thought this was acceptable behaviour - she has called him a sleaze several times - so why didn’t she speak to you about him and tell you he made her uncomfortable, rather than praising his big, sexy arms?! Why agree to go on holiday with him and be trapped within the confines of a boat?
She was telling you off for not communicating with her - sounds like it’s the pot calling the kettle black if her unwanted attention from him is to be believed. Honestly.
It sounds like he and his wife may be swingers and are viewing this holiday as an opportunity to do some wife swapping. This may be mainly down to him but his wife sounds complicit with her sexual comments to your wife, asking for those details etc, was clearly with ulterior motives. Also the position in the seating arrangements on the plane is interesting, with her between the two of you.
I’d be very wary and cut them off after you’ve told them you can’t/wont go on the holiday. If you go you will be opening a considerably large can of worms and it sounds like you still intend to hang out with them while there. If you confront the situation there and then you will have to avoid for the whole time you’re there and they may cause a scene.
Just don’t go.