My husband and I are going away overnight this week leaving about tea time then back the next morning , all our children normally go to their grandparents if we are working or go anywhere . My eldest age 15 ( 16 start of next year ) wants to stay on the house while his young siblings go to their grandparents , I’ve said no but he’s adamant he’s responsible enough . He’s geeky and introverted and won’t invite anyone around and doesn’t go out and drink or anything . I’m unsure if I’m being unreasonable in thinking he would be perfectly fine .