She is a succubus that have a contract with the guy, but if you are going for the "real" sucubus, everyone that she fucked should be dead, even the guy that she suck at the gloryhole don't die, and she even pay him (reverse hooker). I don't care if she fucked the world before, that was BEFORE, when she is with the mc and she is a LOVE INTEREST of him that is cheating/ntr. In the end, like
BTLD said, is your game, but for me, the game is dead, for me a harem is not having your love interest sucking other people there, and if there is somenthing like that, give the player the choice if he want that or not.
Right...you are not forcing, you are not giving the choice to since there is no way, the only way to not forcing someone is not PLAYING the game....