As a father for several decades now, I hold fathers to a strict ethic part of which is as follows: you must, at all times throughout a child's life, be a father to that child. If you should have any feelings for that child other than parental, you must subvert them, never manifest them, and never let them affect your decision-making.
"Generosity. That was my first mistake." "Experience must be our only guide; reason may mislead us." "Instagram is Twitter for people who can't read."