Afterwards, when it's all over and their phone have remained silent for long enough to realize that there's no more A playing games with their lives, when they can get out of town and start afresh without any secrets hanging over their heads like a Sword of Damocles, Spencer tells her lies with so much conviction that she can't tell them apart from the truth anymore.

The lesson they learned when A used everything they ever tried to hide against them should have been 'no more secrets' – but nothing so reasonable, nothing so healthy could possibly come out of something so twisted.

Instead, the lesson Spencer has learned, the one she lives and breathes now, is 'keep the truth so deeply hidden that no one will ever uncover it', and for that to be true, she too has to believe in the lies.