I understand that certain tags/kinks aren't for everyone but when it comes to non-con themes, I prefer the story to be actually non-con and not give the player power over what happens to them, only how they react to their situation.
I however am wanting to create games with either other tags, or other ways of executing these tags.
It's not so much that I am against this or that tag, but I dislike a lack of agency.
To me, these games are about choices. And while I understand that the choices are limited, because they have to fit the story and the way the developer wants the story to go, this is a pretty big thing.
In my opinion, drugging and raping are exclusive with the consentual sex that is presently also in the game.
Given that the MC does actually want to have a sexual relationship with her brothers and/or father, the drug rape makes that path pretty unlikely. Finding out she was drugged and raped would very likely make her feel angry and betrayed. So it means you are limiting yourself to only a story where she does not want to have sex but is powerless to stop them. That could be interesting in itself, but it's not what's presently in the game.
In my opinion it would be better to have the brothers drug her that evening for the first time, depending on her actions during the TV night and/or drinking the milk (or whatever). Then you could have a rape path and a romance path. I think at this point it would only require a few changed dialogues.