My daughter will be finishing secondary school next year and will have just turned 16. She wants to go on holiday after she leaves to go to Benidorm with her cousin, aged 23, who's offered to pay for the entire thing and will be taking her 2 yr old. My daughter has never been abroad before and neither me or her dad will be in the position to go. It's not that I don't want her to have such a wonderful opportunity but I think she is still far too young and not mature enough to be travelling abroad without parents so I've said no. For context, me and dad have been separated for many years and I hardly know the cousin(his side of the family) anymore but my daughter is very close to her. My daughter's safety is the most important thing in the world to me so when I think of all the things that could go wrong it reinforces this belief but AIBU??