"But as it stands only 3 people know you're the biological father of the boy, and while it may take all your will power, I think it should remain that way."

Says Prudie, noting that it's only a cousin marriage in the offing and not mentioning the thrilling line in the wedding ceremony — often used for drama in fiction — "Speak now or forever hold your peace." That line is there because of problems like the one raised by the advice seeker.  In fictional stories, it tends to be used to create tension over problems like — spoiler alert! — this: