DH, DS3 and I have booked to go to Turkey for May half term. DS1 17 and DS2, 15, don't want to come as they want to stay in London to hang out with their friends, do sport etc. Both are getting to the age when they don't really want to go on holiday with their mum and stepdad. I had arranged for them to stay with their dad who lives 10 minutes away but they say they want to stay in the house and do their own thing (they're not overly keen on their dad). In any event, even if they did stay with him then they both have keys to the house and would definitely come and hang out here and stay over. Question is, is it safe to leave them alone at this age? They are both tough and self sufficient but probably won't be great at clearing up after themselves and there is a moderate risk DS1 will have a party or at a minimum invite friends over although I don't think he'd be really silly and invite loads. I feel guilty for going away without them but at the same time need a break and to spend some time with DS3 and DH who I barely see due to work schedules (pass like ships in the night). Thoughts?