I'm gonna lose my mind if this guy accidentally predicted the evil queen being a sister or half-sister or something to the player
Nah. It seems quite clear that the antagonistic god is possessing the queen or at mininum is connected. Even the succubus maid of that god was with the queen.
What i want to know is how exactly mc's mom, the queen, and the slavery chains are connected.
My theory is that the mom who is a fallen goddess is being used as a power source by the queen that is possessed.