You have chosen the wrong cruise line. This isn’t just Adults Only. On this line, Adults Only really does mean that all (or most) has sort of a sexy undertone. And a very gender- fluid, open sexual undertone. All Adults only isn’t like that. For example, this is nothing like a Sandals vacation which is adults only but fairly conservative with very few LGBTQ+ couples.
If your choice of wording is any indication, you aren’t going to be happy at all. Truly, honestly, choose another option.