Long story short, we were due to go on our first family holiday in the next month nothing was booked, but much talked about it, planned etc. However we have experienced an unexpected problem getting DSC the necessary travel docs. There is no way they will be back in time for us to travel. So I've suggested we postpone the holiday until Christmas (next school holidays, our holidays from work) and I want DH to suggest if this is an option to his ex before we obviously break the news to DSC. DH is dreading it, as feels he's let DSC down and that his ex might put the breaks on us travelling at Christmas. We are seeing ex and DSC at the weekend, for a family event. AIBU that DH needs to have this conversation before the weekend so we aren't avoiding the topic or flat out lying as deep down we know we can't practically travel in the next month. (Emergency travel docs/express passport not an option - I've tried)