Temis the Red-Nosed Vorta wrote:
But there are far hotter potatoes for her to stumble across. Dexter was the Bay Harbor Butcher and let everyone think Doakes was (including his grieving family!!!) Rita died because Dexter was playing footsie with a serial killer (and interfering with the police investigation that could have caught him sooner.) Brian/Rudy was Dexter's brother and only started the relationship with Deb that almost resulted in her death because he was trying to reconnect with Dexter. And the hottest potato of all: Harry's role in training Dexter to be a killer.
She knows that already. She found out and told Dexter in the final episode of season four.