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A sends Spencer messages which makes her suspicious of her mother. At one point, Spencer's dad was having an affair with Ali's mom. Spencer realizes that Ali and Jason are her half siblings. She also thinks her mother has killed Ali because she found out. When Spencer confronts her parents, her mom says she never knew anything about the affair. All of the liars get arrested for the murder of Ali because Ali made everyone believe that they murdered her. The girls tell the cops that Billy Ford killed Ali and Jenna.

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9y ago

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