There is nothing likeable about this story. Trigger Warning: The ageism right from the start is so blatant and insulting, it's severely triggering. The family dynamics are disrespectful, manipulative and borderline emotionally abusive in all directions - the only positive part being that they all do it to each other in somewhat equal measures, so nobody seems to be too unfairly victimized - silver linings and all... The main character is in her mid 20's, but behaves like a bratty horny airhead teenager throughout. That's all we know about her personality (in addition to the above-mentioned inherited familial general rottenness of character). Nobody else has enough character showing for any sort of evaluation. The supposedly romantic feelings are nothing but insta-lust between two shallow bored people on vacation, making this story more pornographic than romantic.
There is very little happiness to be expected from this book's "happy ending", but then I didn't like the characters enough to genuinely wish them any happiness at all. Another silver lining, I guess.
It was short enough to finish, but still too long, and just generally not worth the bytes it's stored in.