Sorry if you ship Raura, but they are actors. Apparently good ones if they have multiple seasons of Austin and Ally and get to be on Disney Channel Original Movies! No offense to Raura shippers though!
Girl Meets Texas Part I think in this part, Lucas knew if Cory didn't kick him out then he no longer viewed him as a threat. Lucas was worried that Riley actually did view their relationship as brother and sister. And that scared him.