<P> Melissa was blackmailed by Mona into wearing the Black Swan disguise to the Masquerade Ball in order to distract Jenna . Mona threatened to reveal her fake pregnancy if she did n't obey her orders . Later , Melissa got onto the Halloween Train dressed as the Queen of Hearts and drugged Aria . Wilden then attempted to push her off of the train in a box with Garrett 's dead body . It is implied that she was once again blackmailed . It is implied in `` A Dark Ali '' that Melissa is once again working for `` A '' , as she is seen handing a recording ( presumed stolen by `` A '' ) to a man resembling Cyrus Petrillo and later implies to Spencer that `` A '' has something in store for Ali and the Liars . </P>
<P> Melissa was blackmailed by Mona into wearing the Black Swan disguise to the Masquerade Ball in order to distract Jenna . Mona threatened to reveal her fake pregnancy if she did n't obey her orders . Later , Melissa got onto the Halloween Train dressed as the Queen of Hearts and drugged Aria . Wilden then attempted to push her off of the train in a box with Garrett 's dead body . It is implied that she was once again blackmailed . It is implied in `` A Dark Ali '' that Melissa is once again working for `` A '' , as she is seen handing a recording ( presumed stolen by `` A '' ) to a man resembling Cyrus Petrillo and later implies to Spencer that `` A '' has something in store for Ali and the Liars . </P>
who is working for a in pretty little liars
who is working for a in pretty little liars
Melissa
Melissa