>>282069887
Husband was dead. Mom was a medium and could see him.
Kid saw him and, being a kid, didn't think much of it, just innocently interacting with the ghost of his dead father.
Ghost dad probably tried to reach out and interact with his son, give him a headpat or something, but just like Hikaru fucking people up when he touches people, he hurt or maybe even killed his son. A tragic accident.
Mom probably felt like she could have prevented it by banishing husband's ghost back to the realm of the dead, but ... it was her husband and he was helping her son beat pokemon.