After loosing Emily to the demons, Lily had faced a horrific childhood. Her days were filled with screams and cries of pain from loosing her sister and the demons torching her. Her parents sent her to a mental instatute. Lily was examined and 5 years later cured.
She attended college and got married. All during this time period in her life she never saw or heard the demons. That isn't until she had her first child. After that it was all down hill for Lily. You see the demons never really left her. The therapists and doctors just convinced her that they weren't there.
The demons lived inside her they consumed her thoughts and mostly her soul. They fed off of it. But Lily never noticed it until after her first child was born because the demons left Lily and possessed her child.
The demons possessed the dear little girl for 5 years. After that five long years they left her body and became demons again. They vowed to kill Lily's eldest daughter the same way they killed Emily. So they waited for many years until Lily had two beautiful daughters.
They then waited longer until they were they same age as Emily was. They then lured them into the wood with a similar ball incident as Lily's and Emily's. The two girls walked up to the house and opened the door they ventured up the the third floor and found a teen on the bed crying. Being the thoughtful little girls they were they went in to comfort her.
They asked who she was and she replied" I am your aunt Emily."