It doesn't matter that the drug is fictional. You wouldn't be tagging to inform the characters ingame that there is rape happening, but rather the people playing the game and those people, living in reality, would know the actual, real, definitions of rape. And unless people are still trying to defend Bill Cosby "artificially changing someone state of mind to get them to fuck you isn't rape" is a pretty bad hill to die on.
You could define the drug and what's in it however you want but as long as your plot progression is "MC thinks he can't get in his mothers panties" -> "MC administers a drug to her without her knowledge because he thinks it will lead to her actually wanting to fuck him" -> "mother now wants to fuck MC and shows clear signs of being affected by a drug" you're basically making any questions regarding what is in the perfume obsolete since you have already acknowledged it serves the purpose of lowering her inhibitions to make her do something she wouldn't be doing without the perfume. It could be raccoon piss and as long as raccoon piss in your games world is somehow known to have an aphrodisiac effect and lowers inhibitions it would not matter since the thing people were arguing was the actual effect and what the MC uses it for, not the fluff that surrounds the effect.
And as far as the tags go, they are to broadcast what your game features, yes, but
everything your game features. People here do not tag their games for fun but because they are expected to do so:
https://f95zone.to/threads/tags-rules-and-list-updated-2019-03-24.10394/
And there is both the sentence "
Please report any thread with incorrect and/or missing tag(s)." in there and a clear description of when a tag is to be used "Rape [Forced or non-consensual sex.]".
Also:
https://f95zone.to/threads/game-uploading-rules-2019-06-25.524/
"Please ensure games are properly tagged, tags should only include content which is
currently in game. You can find a list of tags
You must be registered to see the links
. The Genres section can include more specific tags/genres/fetishes." showing that while you can be
more specific when listing those tags in the genre section, the linked list is basically the baseline if shit in there applies to your game. It also points out that the tags are supposed to reflect the current content. I see no line about only tagging the fetishes for main characters but leaving out the ones for side characters, after all the side characters are also part of the game you are promoting.
Your game features forced sex with a character, in this case Olivia, and is thus missing the tag for Rape. This discussion wouldn't even be happening in a thread started by one of the moderators since they adjust tags correctly when something tagworthy is featured somewhere in a games update, as they have no personal stakes in it. Things like these tend to only happen when the OP is also the creator since then the whole idea of "avoiding tags that sound negative" comes into play.
As of right now your game doesn't seem to be
about incest (since you could just focus on Camille, Caroline and Nicole, avoiding the MCs family), it simply features incest. It's not
about traps since you can opt out of the Camille path completely but it features a trap and by exactly the same logic it's not
about rape but since Olivias path exists in it it does feature rape. So it is quite simply incorrectly tagged.
Them supposedly just being sidecharacters doesn't even change that considering they are actually tied into your games world. Veronica is the MCs former teach and Olivia is the chemistry prof at the local university. The "University" location, which is one of only 5 locations on the map, exists exclusively to visit Olivia. They're not disconnected from your base game in any way and once you go past a single warning they are also accessed the same way the other characters are. Hell Kaira even meets Veronica because Veronica is her current teacher, fully acknowledging her existence in the games world. Which means that since Veronica is friends with Olivia, Olivia is also acknowledged as an official part of the world you made.