You begin with an impassioned, if somewhat exaggerated account of your "reconciliation" with Count Foles at the spring fair last year, before swinging to a bold implication that his half-sister was moved in suspiciously close to his father's death.
Arthur nods his head, seeming to take it in, and his eyes widen a few moments after you mention the swiftness with which his half-sister and her husband took up residence. "You think... you think that she was involved somehow?"
You give a noncommittal answer, saying that it is merely... suspicious. But it is clear that the seed you sought to plant has clearly taken root.
Seizing this momentum, you launch into an impassioned speech on how helping Arthur gain the County is the right thing to do, despite his father's well-documented excesses and errors. Rising to a crescendo, you talk of your shared common backgrounds, and how that knowledge breeds fair and accomplished rulers. You finish, practically bellowing by this point, by asking for his permission to advance his claim as the true Count Foles of Folesden.
Your passion and argument has clearly affected the boy, because he drops to one knee in front of you. "Sir Stone, I promise you that I will not rest until the County of Folesden is in my rightful hands." Again, playing the moment, you pull him to his feet, clap him on the shoulder, and tell him that he needs not bow to you, for he is a Count in your eyes from this day forward. You incline your head to him, and you see his chest swell with confidence.
Any further discussion for the evening, or do you have plans to set into motion for the winter?