Ive been living with my two children for 3 months now.
The other night my seven year old son was brandishing a very large kitchen knife and came towards me with a silly grin on his face.
On previous occasions he stabbed me with a fork (albeit lightly) and hard with a sharp pencil.
I asked him repeatedly to put it down. No answer. I explained it was dangerous and he might cut himself. No answer.
I yelled at him, then he put it down and forgot about it.
Later that night he said he would like to cut his sister and make her bleed.
A week before he told his grandmother he wanted to hurt her until she was dead.
What is going on?