The watch itself looks fine, but at 15 mm lug width I imagine it's quite small. If you have wrists that it aesthetically looks good on then keep it, but chances are it actually looks quite small if you have average sized wrists.
Since you bought it on a cruise, you can't really return it from what I can tell. You can always resell and take a hit, and learn the hard way that you shouldn't trust salespeople. In that situation especially, where returns are impossible, they are motivated to sell you whatever they can't move.
Also next time don't call it a women's watch, Reddit will bend over backwards to tell you that men can wear women's watches (lol). Next time say "is this watch too small" with a wrist shot and leave out the fact that it's a women's watch and people will give you an honest, non-ideologically tainted answer.
Might be a fake; women's Cartier fakes are more common than you'd think