He put kitty litter in the fish tank. Pee-y kitty litter. It's clumping litter and he just picked up a couple clumps and plopped them into the tank. I have no doubt the fish will die soon. Then he laughed! And he tried to give the baby's hand to the cat. He tried to feed his brother to the cat!
You know in the movie when the lady finally realizes that her adopted son/neighbor/nephew/babysitting client is the devil, and no one else realizes it but her and they all think she's crazy when she tells them he's the devil? I am at that point right now.