I'm starting a new job in a few weeks and I've negotiated flexible hours (some days longer and others shorter so I can do some school pickups). DH wants me to leave an hour early to go to something he's been working on with him and the kids during my first week, but on one of the days that I've said would be a longer day! It is something that will be fun for the kids and as he'll be in work mode he won't be able to keep an eye on them so thinks I should just leave early and go with - but I think it will look really bad not to stick to the hours I've said I'd do in my first week - feel like that's when I should be on my best behaviour and trying to prove I can make the flexible working work. AIBU