Ok so how would you say mental corruption or a "Charm" effect would be received as a player? A situation where that is a sort of obstacle for the player to overcome, but in the outcome that they fail, their character ends up doing the 'sex move' even if its against the wishes of the player. It would take away control from the player and result in a set back , but it would be in the same vein as losing a life in Mario bros just an 18+ version of it. Would that be pushing too many boundaries?
I think that is a cool idea, as 'dub con' is certainly an important kink aspect where loss of control may be something a player is ok with, even as a bad ending. I would make sure that first, you make it very clear to the player that this game will involve aspects of involuntary mind control. Then secondly, make sure to include some type of 'safe word' style safety tool, like Script Change or X-Card. This gives players a means to jump in and call a stop to things if the play goes beyond their comfort zone.
Hi there!! Just putting in my two cents. "Dubcon" is shorthand for Dubious Consent. It means that consent is not clearly given or established by a character. Emphasizing here that is not clearly given by the character, it is important that consent to the situation is given to the GM by the Player controlling the character.
Once proper safety tools are established, and everyone is OK with mental corruption and characters getting into situations that may involve Dubcon, then it's all good!