Incest autofellatio
No offence to you and your interests, but probably no one here.
That's not really the kind of content me and the other members come here for, and probably not the kind of content the artists want to make. But if you want to try, then write a full script and submit it for the vote when it next opens. That is the way it works here. You won't get a game made just by posting the idea in the forum and asking someone to make it.