My OH’s brother has a big birthday next Summer, and he’s having a big party (50+) at their family home in Spain. We’ve got two small kids (3/1), and I’ve been told by my OH that we can’t take the kids as we wouldn’t be able to stay for long at the party/stay at the house, and if we can’t find childcare for the kids to stay in the UK with my family then I’d have to stay in the UK with the kids as it’s their brother. I have always made a good effort with their family and have a good relationship with them, but this has got me feeling frozen out - AIBU?