The key issue lay with Ye Zhennan.
Ye Zhennan's corpse wouldn't consent to be buried—each time she was placed in a coffin, she would extend a long tongue and run out on her own, to hang herself under the house beam once again.
This was a behavior of her subconscious.
Yet, Ye Zhennan had already seen her son's bloated corpse after it was drowned. So, why wasn't she at peace?
This suggested that maybe the child who drowned... wasn't Ye Zhennan's son, Long, at all!
This problem might have come to light only after Ye Zhennan had become a strangeness.
When she first saw the swollen corpse of the child, she couldn't possibly recognize the face, and could only rely on the clothing to identify him.
If the drowned child wasn't Long, could it be the Ning mentioned by these children, who had stolen something from the King of the Children? But why would Ning be wearing Long's clothes?
Moreover, since Long hadn't appeared since then, it definitely meant he had also died.