Have posted about this before but it's driving me nuts, need to vent. Stepson (18) has in the past left his dad's house unlocked all day, windows open etc. They live with me now and he continues to do the same despite being told again and again. Yesterday I came home to an empty house, bathroom window wide open. Stepson had left it like that and gone out. Tell DH when he comes home and he rolls his eyes and goes 'I'll have a word'. I ask him later what stepson said when he'd had said word and he'd forgotten to text him. So he texts him and just gets 'oh sorry I forgot' - what he always says. So I said ok that's enough now I don't want him left to lock up any more. Husband says 'you can't just decide that, it's my house too.' Technically he's right but he moved in with me quite recently so I do still see it as my house although I probably need to work on that. So am I being unreasonable to not want him being left to lock up? Husband says he will make him call at the point of leaving to make sure that he can check everything is locked but FFS he is 18, why does he need to have his hand held like that?!