You can be dominant without doing anything too evil, but it won't necessarily put you on her "Dark" path. Just choose the choices that feel right. Naturally, this means that things like spanking and belting her won't be an option. When your relationship with Maddison picks up and becomes more "intimate," dominant options will be available, as that's a major plan for Maddison (both con and non).
Alternatively, if you'd like to walk the line and still include things like spanking but not go too far, you just have to make decisions that feel appropriate. The belting scene, for example, was really dark and also kind of overboard: that naturally means you shouldn't make that choice if it feels "too evil" for you. Doing so won't take you off of her dark path.
Also, make sure you choose "Discipline," not "Enjoyed It" when prompted. Telling the game you enjoyed hurting her is basically like telling the game you're a sadist, whereas telling the game you prefer discipline means you're just trying to straighten her out.
You can literally give her a bath and wash her pussy, feet, etc. And she's most DEFINITELY a loli, so naturally, that scene is why the game has the tag. If you didn't encounter that scene, it's because you aren't playing the game with the "True Edition" patch. Make sure you apply the patch to play the game fully uncensored.
If you did see the scene, it should be pretty obvious which direction things are going to go with her... (in other words, just because you haven't fucked her yet doesn't mean you won't have the option to, as the story progresses. You'll definitely have the option).
