Haven't read the books, but I watched the episode last night. pretty sure that was her dragon saying goodbye. I think the paralyzed boy eventually controls the dragon(s). Be interesting to see who he aligns with (which army), but I think we're shaping up for a battle between the dragon queen/tyrian and the dragon boy-to-be.

The Stark girl story lines have gotten boring to me. I don't know what they're doing or where they're going, but they're just traveling with no purpose.