There's literally no exuse for leaving a five or four year old child alone! This woman should be done for neglect. Anything could have happened to her son like piers said and when he tried to tell her this she either laughed or dismissed it but if it actually happened she'll play the victim. I'd leave maybe like a ten year old alone because like some mothers said that is roughly the age they walk to school on their own. Plus, they have proablary be tort fire saftey at school if god forbid one started suddenly at home when their at home. A four year old doesnt have this