Spoiler
Idk, I think it's common sense to know that parent's actions will affect the kid. If you alter a person's reality, that's what they'll know and think is normal. Like a cult, if you grew up in that environment, that's your norm. How can a kid, whose whole world is their parents, think anything is wrong? Even If they feel something's off, children would usually feel powerless to do anything like the son in this story.The son also chose his mom instead because his dad was scolding him and was literally about to hit him. The eyes he was giving his son were CRAZY. Then his mother shows up being kind, who do you think the child would want to be with more? Even until the end, the son was placing blame on himself for what happened when it wasn't his fault whatsoever.
what they did was wrong but i kinda feel bad, especially for dad. if they knew this was going to happen then they wouldn't have acted like that at all. i guess i hurt myself for thinking it's going to be a good ending T^T