Imagine working for a pool cleaning/maintenance company and being told your job today is a pool at a housing complex, thinking “That doesn’t sound too bad,” and arriving to this.
A.D has a big box in their lair labelled “letters from A.D”
There is only one instance across the whole show whereby ‘letters’ are significant: Alison and Bethany were sending letters to each other.
Although we only ever saw letters from Bethany to Alison, and never from Alison to Bethany, “did I thank you for the clothes in my last letter?” implies this indeed was a two-way conversation through the letters.
Bethany is Uber A/A.D and the above box is her collection of letters that she kept from Alison DiLaurentis (literally A.D but not THE A.D).
The fact that Bethany has kept these letters from Alison after all these years must mean that Alison DiLaurentis’ letters are significant to her. The letters prove that Alison only sent Bethany a yellow top so that she can kill her and fake her own death. (Then, Mona hit her, but she thought it was Spencer, like the rest of Rosewood. Hence she shot Spencer.)
Bethany is keeping the letters from Alison DiLaurentis because this is her motive: revenge. The letters prove Alison’s vendetta against her and Uber A is the smartest of all because she fooled Alison. Bethany is not dead. She is back for revenge.
(Also in the first pic above we see a Spencer mask. I’ve got heaps of messages asking for proof of that claim, so it’s from 706. Maybe it was A.D who spoke to Hanna in 701 and not Spencer’s twin. Perhaps they were just wearing that mask? Who knows.)
