We are at that difficult age where older DD is going away all summer with friends, so what do we do with younger DD (16)? She will be bored with just us but is too young to go away on her own with friends. We can ask her if she wants to bring a friend with, but what is the etiquette here? The friends' parents are likely to jump at the chance, as due to health issues they are unable to go on holiday this year. However, we can't afford to pay for everything for her. Can we ask them to pay for her flights and accommodation? We would cover everything while we're there - food, activities, etc.