YMMV / What Keeps You Alive

• Complete Monster: Jackie, real name Megan, is a vicious and depraved Serial Killer who murdered her childhood friend when she was young. Developing a love for killing, Jackie seduces other women and brings them to her childhood home in the woods, giving them a locket of them together before murdering them for fun and keeping the locket as a trophy. When her current wife Jules survives her initial murder attempt, Jackie psychologically torments her and murders her former neighbors Sarah and Daniel, taking time to mock Sarah with how their childhood friend "fought harder" before attempting to murder Jules again, who discovers Jackie has a great deal of victims that she has betrayed and killed for sport.