steven999 i'm not saying the motive makes sense, cause obvs we don't know that yet (but i think once explained it will probs make sense)
all i am saying is that it is literally so unlikely that any of character is A.D. There have been too many clues/hints pointing towards this twin, too many out of place Spencer scenes that make sense. and with the promo for the finale, it looks even more obvious that she will have a twin
steven999 the spencer and wren scene.... completely unnecessary and out of the blue. that was the twin. low and behold, wren is back this episode... hmm.... why the hell would he be back if there wasn't something going on with spencer
the episode where mary is with spencer in her living room looking through photos, and makes that creepy reference to how they look so alike, "just like twins"