So I tried it, went with the Cuckold route even tho I hate the term (i prefer when wife cheats secretly and MC is not humiliated rather enjoys cheating wife in secret-ish..), but so far it seems to head in okay direction, will see how "cucky" it gets later. Deserted island is definitely interesting topic, as far as I know only one other game have explored this idea with NTR tag, but it left much to be desired so this game have a chance to one up it at least.
Text is obviously not the strong suit in this game, but it is not totally confusing and you can follow it through if you forgive mistake and style error here and there. Models are okay and scenes are not horrible either so far and the potential for future greatness is definitely there. One little issue tho... I totally prefer the sister of the wife rather than wife herself lol, but that is totally on me cause i have a bit of a thing for blondes.
All in all i am interested to see what future updates hold, give the game a try and see for yourself