After the 7x20 i think Twincer is real. What happend that night besides all the Ali drama, is that Twincer a.k.a Bethany goes as so many times to Spencer’s (we know that Spencer didnt remember some things she did while being in pills, as Veronica told her, maybe Bethany was in those situations and not Spencer) and saw her looking for Ali. Twincer discovers that Spencer its her twin but as she was dressed like Ali ( and was blonde as well) before she can tell anything to Spencer gets nocked by Mona. Then Melissa buryed her and finally its saved by someone unburying her (Probably Wren idk how or why) as Grundwald saved Ali. Wren left her in the hospital and Twincer went back to Radley and stayed there for years. Wren felt in love with Spencer bc she reminded to someone somehow, obs. But nothing went well bc Spencer wanted someother guys. (Everyone ,actually) When Spencer got mad bc Toby’s (fake) death, she went to Radley, somehow Twincer drugs or make her go in coma and just replaced her. (Dying her hair the same color bc she was blonde people) Twincer lives Spencer life for the rest of episodes. In season 7 Spencer wakes up and want her life back, so team up with Wren to be AD. Her torture Twincer and her old friends bc she didnt noticed the change. I know its a shitty theory and wast just to laugh about PLL bc after 7x19 anything could happend and the show goes to worst. Does anyone besides me think that the show only get interesting and good whe the writers based in the original plot from the books? I mean, seasons 1 and 2. Then Marlene had some lucky plot twist to save the show but, this last season its been so bad. Almost every episode its like a new question instead of an answer. Idk maybe i lost my feelings for the show.. lets see whats happend at the end.