1 When a few people broke into the old man's room, the daughter's video was playing on the TV, and the child's voice sang lyrics that were not suitable for children's age. It probably means something like "be his lover", which is reminiscent of disgusting words like "daughter is dad's lover in a previous life".
2 The old man imprisoned the murderer of his daughter in the basement, and used his sperm to make her pregnant and compensate her for a daughter. Normally, the father who lost his daughter should be eager for the murderer to eat his flesh and drink his blood, kill her directly or torture her. Because people can't be resurrected from the dead, even if they have another daughter, they can't copy the soul that left. Everyone is unique. Therefore, the old man is angry and hated for her killing his daughter because of his distorted attachment to the identity of "daughter", his possessiveness and desire to control a woman he raised, and of course there may be a perverted and distorted love meaning. So what he wants is not the murderer's blood and blood, nor let innocent women play his daughter (substitute), but let her give birth to the next "daughter" to satisfy him
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