Accident or not......the guilt a child would feel and carry with them throughout their life is what Aiden wanted to avoid. His mother committed suicide, was drinking and was despondent. There is nothing for any other children to tease or bully him about.
This story is sort of a counterpoint to how Clyde keeps insisting and accusing Jordan of "killing her mother". Clyde, for some reason, WANTS Jordan to feel guilty, be despondent, etc.
Aiden wants only to protect his son. And perhaps, being an attorney, he has seen this happen to other youngsters, and did not want his son to have to experience any of it.