I'm not talking about St Helena, but Elba. The allies/Bourbons violated the Treaty of Fontainebleu-the Bourbons refused to pay his pension and his wife and son were not allowed to join him at all. That was the catalyst that had him decide to return to France.
And stating that Napoleon was away from his son for whatever reason, usually deployments, so that further separation from his son is OK, is a cheap shot and very unsympathetic to military parents in general. That does not mean that Napoleon did not love his son (he doted on the boy). And I have known many Marines that have to deploy with young children at home sometimes for months. For the first thirty months I was married, I was deployed for twenty. That comment is insulting to everyone serviceman who served and has to deploy away from their families. I was lucky with my son-I was already retired when he came along so I've been away from him overnight for about two weeks in sixteen years.
It also clearly demonstrates that you have little knowledge of Napoleon as a parent and his family life.