Married couple, one DC, going on a city break tomorrow, within a 2 hour drive. Check in is from 3pm.
Person A gets a last minute slot for a wanted but non-urgent appointment for the morning of the break. Booked in last week, checked with Person B at time of booking, all fine. Tells Person B the time of the appointment, and communicated "ready to leave by 12"
Person B (tonight) asks about the length of the appointment to plan the morning, it is longer than they anticipated, but they didn't ask at the time. This means we leave later than they had anticipated but with time. Lunch may be pushed back slightly which could result in a grumpy DC. It is possible to take snacks on the journey.
Person B is pissed and now disinterested in sorting the plan for tomorrow. Person A is consequently annoyed because things need to be sorted regardless.
Who is BU?
YABU - Person A is U
YANBU - Person B is U