Inspired by the nanny being brought on holiday thread but different situation. This happened last year but my brother is still miffed about it so want opinions if iabu, though I don't think so. Brother has 3 very rambunctious sons. He decided to go on a cruise and invited my teenage dd along. She would be sharing a cabin with the boys, and babysitting every evening. She would also be expected to watch them during the day quite a bit, while db and his wife do various activities. Db was outraged when I said no, he thinks its a great opportunity for dd to have a free holiday on a posh cruise ship (which we can't afford admittedly), have lovely meals, and spend time with her cousins. There was no question of payment, just a free holiday. I told him that it would not be a holiday for dd, just an extended babysitting gig. Most important of all, dd doesn't want to do it so its not happening. But was aibu to say this is not a 'free holiday?'