Jessica DiLaurentis (née Drake) (Anne Marie DeLuise, later Andrea Parker) (seasons 1 -- 2, 4 -- present) is Alison, and Jason 's mother and Charlotte 's adoptive mother, who spearheaded a charity fashion show in Alison 's memory. Jessica DiLaurentis had an affair with Peter Hastings which produced Jason. She returns in Season 4, and it is revealed that she was the one that buried Alison in order to protect the identity of the person who hit her with the rock. She is also thought to be one of Big "A 's '' minions, due to the fact that she is protecting them. In the season four finale, she is killed by an unknown person and buried by "A ''. In the season five finale, it is revealed that Mrs. DiLaurentis is actually the mother to Big "A '', who is named Charles. In season six, it is revealed that Big "A '' is CeCe Drake, who was born as Charles but allowed by Jessica to transition into Charlotte, despite Kenneth 's disapproval. She lied to Kenneth, claiming that Charles died. In the finale, it is revealed that Jessica has a twin sister, named Mary Drake, who was actually Charlotte 's biological mother. The DiLaurentis family adopted Charlotte. It is eventually revealed that Mary is the one who killed her.
who plays allison's mom in pretty little liars
Anne Marie DeLuise Andrea Parker