DS1 has just turned 15 and wants to stay alone in the house on Saturday night as the rest of the family is going away overnight. DSI does not want to come but I am not comfortable leaving him alone overnight mainly as I suspect he'll invite his friends over for a party plus there is a risk something else could happen (fire, burglary etc). He's confident but not responsible at all. DS1 is insisting that his same age friends all stay over night alone when their parents go away. Feels wrong to me but wanted to check that the general consesus is.