Pretty Little Liars' Twin Twist Is a Sucker Punch For Alison

Jessica DiLaurentis (Andrea Parker) has the secret twin, as revealed in Tuesday's Pretty Little Liars finale.

Let's review: Jessica's twin sister, Mary Drake, is Charles/Charlotte's (Vanessa Ray) birth mother. Jessica and Alison's father (Jim Abele) adopted Charles while Mary was a patient in Radley

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