Talk:Mona Vanderwaal/@comment-166.137.209.171-20140831212517/@comment-80.161.21.243-20140907172447

That's actually a really good theory!

Alison killed Sara (thinking it was Bethany) and Bethany tried to kill Alison in revenge for killing Sara, her sister, that night (and we know that Bethany was crazy so she could probably easy kill someone). And Mrs. D saw that it was Bethany, and Bethany said to her: If you say i killed her i will tell Kenneth (and probably everybody (or something like that i think)) about the affair. And now Bethany is "A", still trying to kill Alison in revenge for killing her sister!

Finally, it makes sense! :D