I am not saying Aria's dad is A at all but I just watched the promo and seeing Aria's shock when Ezra tells her something gave me the idea that, from an emotionally conflicting point of view, it'd be interesting and that that is why Ezra and Aria were destined to be together, for this awkward moment when he puts her in a tricky situation with the "Truth."

http://uk.eonline.com/news/537839/pretty-little-liars-brace-yourselves-for-this-shocking-first-look-at-season-5-watch-now