I read your post but didn't really figure out some things.
Is it a game you live from the eyes of the cuck, or you see the story from the cheating one ? Who's the MC ?
Plus, in your description, it seems you describe two woman. Shall the story revolves around the two, are them related at any points ?
AI can give you some direction, but you mostly will have to modify the writtings for it to feel more complete. I'm available if you need some help. Just dm me.