PLL #ENDGAME Theory
A.D = Avery Drake
It all starts at Radley - all roads lead back to Radley, Dr Cochran said he delivered “two (Cece and Spencer) of Mary’s babies” suggesting she possibly had more.
I think the night Spencer was born, a second baby was born. Veronica was outside Radley in a car while Peter was inside.
After Spencer was born, a second baby was born; one that Peter hadn’t accounted for, he couldn’t face having to deal with two children. So he pretended that just one child was born - Spencer, Spencer only escaped being left in Radley because she was born first.
The second child born was Avery - Avery Drake. We have seen her multiple times, but only once as a child. Remember the dancing girl from Spencer’s dream?
Avery spent the first part of her life in Radley, where she gets to know Cece, without realising they’re related, and Bethany Young, the three become very close friends.
Eventually, Avery shows she should be allowed out of/ runs away from Radley, the same way Cece was, however she chose not to spend her time in Rosewood. She spent her time in Courtland - where she made friends with Sara Harvey.
Avery was part of the group that Emily and Hanna met, however she was not at the meeting because she was preoccupied with Radley/the A Game.
We were told Avery was struggling with the disappearance of Sara, but she knew Sara was safe the whole time - she was worried about Bethany, after she vanished on labour day (when Mona hit her over the head and Melissa buried her alive)
Both Avery and Cece struggled with not knowing what happened to Bethany - until Mona arrived at Radley. Mona revealed to Avery about Spencer, and Avery clocks that she’s spent her life in a mental hospital while her twin had a luxury life, this is enough to drive anyone crazy.
Due to the sub-conscious guilt of deep down knowing she killed Bethany, while on her meds, Mona lies and says that it was Spencer and her friends.
That is Cece and Avery’s motives to play the game with Mona.
Mona = Black Hoodie
Cece = Redcoat
Avery = Black Widow
Sara Harvey had no reason to disguise herself, Spencer’s twin does.
Although Cece and Avery kept themselves hidden from Mona, they begun to fear she may remember them from her time at Radley and reveal them to the girls, so they stole the game off her.
Avery and Cece continued the game with the soul purpose of revenge for the girls killing Bethany.
For unknown reasons, they decided to end the game in 6x10, however, Cece agreed to take the fall for Avery so that Avery could enjoy her life free. Cece lied about her story in order to protect her, and Sarah Harvey agreed to join as she was friends with Avery and heard her story.
After Cece gave up 5 years of freedom for Avery, to then be murdered, Avery started the game again in order to avenge her death.
Avery has lost the only things she ever had; Bethany and Cece. She has nothing left to live for, and that’s why she’s ending the game, after she finds out who killed Cece - she has nothing left to lose.
A.D = Avery Drake.
ADDITIONAL CLUES:
Notice how all the liars have only one eye shown, but Spencer has two - hinting she has a twin.
The scene in which A is seen in the zoo, she matches Spencer.