I don't understand why that aunt said there was something unclean at home, and on the way home after dinner, she said there was someone under the pool.

This film can be understood as a horror film and a psychological film. So in fact, the ghosts of my sister and mother also exist. It is my aunt who is ill. She saw my sister's ghost. Just like the stepmother finally saw her sister's ghost. Including the unedited version, the stepmother finally dragged a horrible object out of the closet, and then the camera flashed, it was a sister.