Ella learned the truth about Byron’s affair – and the fact that Aria knew about it! – when “A” sent her a letter revealing all of the awful details. Needless to say, Aria felt awful. “A” was causing problems in all the Little Liars lives, and now Aria’s family was also being hurt. Ella decided to move out of their home – and Aria felt responsible. She hated herself for not telling her mom sooner.

But as you can see at the end, the trouble was far from over!