hey, Lou! Glad you're enjoying the game so far!
Are you playing via Steam or Itch.io? If you are playing on Steam you need to install the Free adult patch (Available on steam)
If you got the game on itch.io then the adult patch is already integrated.
Next: Did you get the romantic path? At least a Kiss? Or did you the Friendship path? To get the NSFW content you need to follow the romantic path. Here's a very comprehensive walk through that should be able to help you out > follow the "Dominating Lover" path.
Hope that helps!