Lea is known to be first restrained in Dead Beat, at which point Mab shows up when Lea is summoned by Harry. She has the Athema. By Small Favor Mab knows that Maeve was infected by Lea, it's why she quits speaking. We next see Lea in Changes, at which point she tells Harry she can't think about the infection unless she become vulnerable to it again, implying that it is more like a drug addiction rather than a pure possession. Small Favor is the low point in the Winter time line, when she has been stripped of all of her most powerful allies. Lea, the Winter Knight, and her daughter Maeve.