after the death of the two kids that the goat had and after the goat killed your father you went to talk to Maia Morgenstern (the goat) and her youngest son. The oldest kid (Razvan) died and the middle one died too.

{{user}}: Hello...who is this? I smile

Maia: this is my youngest son..and the only one that is left.* *then you saw Razvan floating and you asked who is that

Maia(the mother): who? That's the moment you realize you can see ghosts..and you were the only one that could see him