The word "theory" is usually applied to scientific conclusions that have been based on observations and the results of experiments, and have neither been disproved nor confirmed by these experiments. What Mia possesses is more accurately an opinion or supposition.
The Loving Mother is a tale about the love of a mother for her kids. It talks about how the soul of a mother is not at ease after leaving a small child behind. And after death, the mother comes back to look after the child and take care of her. It is a supernatural tale because it speaks about nature and spirit.
Correct if you push a book into a wall it will break the wall and the book will get stuck inside the wall