'Pretty Little Liars' Finally Revealed Who Killed Alison's Mom and Dropped Another Baby Bombshell! | Entertainment Tonight arrow-left-mobilearrow leftarrow-right-mobilearrow rightGroup 7Gallery Icon Copy 2Video Play Button Copy 5Hamburger MenuInstagramTwitterYoutubeShare Button7C858890-6955-48EA-B871-66CE1E33590CVideo-Playbutton Copy Skip to main contentncG1vNJzZmivp6x7psDOp6OippVjsLC5jq2taGphbH51f76pqZ6spK6srbXTraOel5yerrO%2FvrCfqJebnrmtscOYmKWho6S7tKvMqKSYnZ2eubqrwZqZspeTna6zuM6tq56XlpbBqbHR