Lights Out

Lights Out - in which a really good sister saves her brother from their terrible mom. So, there is a boy who lives with his mom and the ghost of her friend, his cool sister moved out a while ago. His dad is killed by a monster in the opening scene of the movie, but the rest of the movie appears to take place about a year later. So, the kid is losing sleep because his mom's creepy ghost friend won't stop fucking with him, and Family Services gets involved because he starts falling asleep in school. The mom isn't responding to the school, so they call the sister, Rebecca, and she and her nice boyfriend show up to help. The kid stays with his sister for a night, but the school people tell Rebecca that she can't just take custody of Jake, but she doesn't want to take him home because their mother is mentally ill, coping poorly with the death of her husband, and also Rebecca knows about the ghost lady, and that she's real. So, a few nights later, she is letting Jake sleep over, but the ghost lady shows up at Rebecca's apartment and messes with them there, so she just ends up bringing him home the next day. Rebecca does some investigating, and puts together that her mom was institutionalized when she was younger and was preyed upon by a fellow patient. The spirit of that patient is what killed both of her husbands, and the mom has just been trying to be nice to her ghost best friend because she feels protected by her. The kids have to run and hide in the light while the mom is grappling with the knowledge that her best friend is trying to kill her children, in order to have her full attention. So, the mom knows her fondness and memories of the ghost are what is keeping her going, so she kills herself because that's the only solution she can find, and things are very fucking dire. The boyfriend brings back help to the house! Everyone in this is really good.