Of course I think IANBU (and I think it's obvious whether I'm A or B), but interested in opinions here.
Parents A&B split when child a baby. Parent B moves 100 miles away, takes child. Parent A does all travel (driving) to maintain contact with child.
Progress 15 years. Parent A has other small children, several years of very disturbed sleep. A is concerned that tiredness makes so much driving unsafe (400+ miles per weekend). B doesn't want to do any of the travel to help with contact. Bus (direct) is suggested. B refuses to allow this.
WIBU? And how does any of this get changed/solved without DC starting to think that they are the cause of any problem. They are old enough now to know what's going on, even if they aren't directly told.