Mary Drake

Mary Drake is Spencers real birthmother Mary is twin whit Alisons mother Jessica. When Mary came back to town she killed Jessica but she got away whit it. She started sending letters to Spencer and in one of them the whole truth came out everyting about that Spencer is her child and not Veronicas. Mary sent the letters in a bottle and Spencer started answering and they set a date and time they where going to meet at the " lost woods resort " but the cops followed her there. The day after Spencer got a new letter from Mary that said

- You brought the cops i understand, goodbye!

Alex took Mary also but she trusted her more then she trusted Spencer so Mary wasn't in a loked room and in the end when they found out that Alex had them down there Mary confessed to killing Jessica so she is in jail.