You tell us in this moment i don't see any mc honestly it's a fuck fest everyone is fucking everyone,but since your putting that bold guy as mc then you can put it as a choice for him to cheat or not but that wouldn't make much sense what would be the point of this game ,the thing is you should familiarize yourself more with the tags before putting the game out there and to answer your question if you don't want mc to cheat just make it multiple protagonist game or put choices for everyone and without mc's or something that would be it ...... it's your game at the end of it ...