If my arrival has made Porthos uneasy, please share my apologies with him. I know he is important to you, from our conversation, and I only want you both to be happy. And — to say it explicitly — I do want him to know Louis, if he’d like to, because he is yours.
Will you share that with him if you speak on the matter? I do not wish to make him more uncomfortable, but I do not know him well enough yet.