My 14 y.o daughter wishes to spend NYE at a friend's (boy's) house. In total, it will be 4 girls and 2 boys (including her). All these children have been friends since reception at primary school, and I know all their parents - however, I am just not happy with her staying the night. The boy's parents will be out for NYE but will be home later in the evening; I am within walking distance but I am not happy as I know what 14 y.o girls and boys can get up to. DD promises me they are all 'friends' and nothing 'dodgy' will happen. She has taken huge offense to me not letting her go and does not understand why I am not happy, and I am starting to rethink. Am I being unreasonable by not letting her go? I have spoken to all her friend's parents and they are fine with it. Any advice welcome! 