A Nightmare on Elm Street (2010)
Gwen was one of the parents who sent her kids to a preschool in which Freddy Krueger was the maintenance man. Freddy molested and hurt the children, so the parents took revenge. They chased him down and he hid in a small building. Gwen objected to killing him, but the other parents threw molotov cocktails into the building and Freddy burned to death.
The Elm Street children were kept apart and they soon forgot about each other. When Nancy began to remember things, Gwen panicked. However, she eventually told Nancy the story about Freddy Krueger. However, she didn't tell her at first that Freddy was killed. She told Nancy that he left town and was never seen again. Neither Nancy or Quentin Smith believed her, however. They found the truth from Quentin's father.
DeathShe and Nancy return home and talked in front of a mirror. Moments later she is killed when Freddy Krueger appears behind her through the mirror and stabs her in the back of the head and pulls Gwen through the mirror leaving Nancy screaming.