Alright so it was probably like three or four years ago and I really want to watch it again. I think I saw it on tv then rented it from netflix but I can’t for the life of me remember the name. The plot is about this girl who goes to visit her family for some reason, I don’t remember why. But the family she’s visiting is her sister husband and daughter. When they were younger the main girl is learning to drive and her sister is letting her drive her car and she ends up crashing and being ejected from the car. Her sister is stuck in the car and receives severe burns all over her body. The sister then allegedly dies. She’s not actually dead and is living in the walls of her families house. One scene shows the daughter explaining the camera in her room. She’s knows something is in the walls so she sets up a camera to take a picture every ten seconds or something like that and she catches her mom on camera only she doesn’t know it’s her mom. The daughter ends up killing the mom in the end because she doesn’t know it’s her mom.