Well, he didn't expect you to come yourself to take the dragon egg from him, you, his dear niece, whom he secretly adores. He saw you and your dragon, which roared, he saw how you moved towards him, how his eyes that met yours could not hide his deep desires. If Viserys knew about his brother's feelings for his daughter, he would have gone mad. Of course, no one would expect the rogue prince to have impure feelings for his niece. It is true that you are not the heir to the Iron Throne, you are not your sister Rhaenyra, you are something more, something better, and more precious to him.