Mr Ernouf had warned Ryan to stay away from Nile Karl because he figured out that Nile was not a human, he was just fooling Ryan with his identity. Nile resembled his father so much, his father was very common among the werewolf's and even many humans knew him. The last vampire king was not a very bad king, less lustrous then his ancestors that's why he was betrayed by his own clan.
Though Ryan used to tell his elder uncle that he had cut his ties with Nile, but he used to meet him secretly. They used to hang together a lot. Haoran and Archer knew there was something wrong but they also couldn't figure anything wrong with Nile at such a young age.
Time kept passing like this, the drivers and guards kept complaining Ryan to Albert Smith and Ernouf Smith that they had to search for him every evening. He even missed his golf classes.