Is it legal for a mother to leave her 15 year old daughter at home alone all weekend while she goes to her boyfriend's house? She leaves Friday night and usually doesn't come home until Sunday night. The mother is in her late 50's and her boyfriend is in his late 30's, and this is an almost every weekend thing where her mother leaves her. To top it all of the Boyfriend is a complete to the daughter and is extremely controlling over the mother. The mother always goes to the boyfriend for advice on parenting, and its almost as the boyfriend decides the daughers punishment. My question is it legal and just unmoral to leave the daughter home alone all weekend? or is it against the law? and if it is legal is there anything I can do or say to the mother to help the daughter or should I stay out of it completely?