No selena knows that justin will talk to his female fans. She is sensible enough to know that justin loves his fans as much as he loves her. Selena will talk to male fans and justin will not care. sel loves her fans as much as she loves justin. Selena and justin are happy together, and thats what matters.
I think no. Just like Justin wouldn't get jealous when Selena talks to her male fans. I think they both know enough that they won't cheat on each other. PS: I call them Beibelena