To our son Fingon,
After some serious thought and discussion, your mother and I have come to our decision regarding your relationship with your cousin Maitimo. And this is it: we are willing to leave you alone about it so long as you keep it appropriately private.
This is not an easy decision for us to reach, but taking into consideration the conversation I had with you, I fear it's the best option in this situation. We're not pleased by this nor do we really endorse such behaviour, but since he is only a half-cousin and it is a rather dire matter we've decided to let it slide this once.
If you cannot be discrete, well, there are ways to keep you separate. Do not force my hand. I'd rather not have to hurt you both, but I will if it is for the greater good.
P.S. Your mother requests that you visit us in the near future.