Idea for Horror Movie

Ma is nurse and Pa is just retired. Happy couple but at a change in their life

Pa is bored being home alone so Ma agrees to take a girlfriend's elderly father into her home.

Elderly gent is quiet and no trouble but is kind of spooky. Has a weird effect on the family.

Strange things start to happen around the house.

Ma wakes up with the feeling of chocking. She has marks on her throat.

A picture of the demon is carved into the floor in front of the fireplace.

Pa starts becoming distant and starts to stay in the basement a lot.

Ma starts to get cuts on her fingers and bruises on her body. Ma thinks the elderly man, who she is nursing, is hurting her and vandalizing the house. But she is not sure and they need the money so she doesn't send him away.

Pa is more and more distant emotionally.

Ma thinks Pa is having an affair. She starts to watch him and follow him around spying on him.

He has made a bed of cardboard boxes in the walk out basement. She see footprints in the snow leading up to the back door to the basement. She watches the beautiful young girls who walk past the house.

Ma continues to take care of the elderly gentlemen who requires more and more of her. She feels she is loosing her husband.

Ma finds Pa in the basement in a comma and takes him to the hospital. She thinks he is exhausted from the love of a young girl.

When Pa comes home he still is drawn to the basement. She is furious and jealous. She watches the young girls, ready to attack to save her husband from his foolishness. She follows one around. One girl seems to be the guilty person. She steals her shoes to see if she is the one who is ruining her husband. She becomes so furious, she also buys a gun.

Ma follows Pa and spies on him in the basement to find out which girl is exhausting him.

One night Ma sees him with a demonic woman, transparent and glowing. Pa grabs the demon woman and prevents her from going upstairs. He is sacrificing himself to save his family from the abuse the demon has been heaping on them.

The demon is sucking the life out of him, so Ma drags him out to the car and escapes to the hospital. They move out of the house to another town. You see the demon hoovering over the roof of the new house.