Hi - I am a regular but have name changed due to not having done so for a while 
Just wanting to garner some opinion on who is BU and it's not us how we might navigate the situation with his ex.
Oh has been banned from driving due to accumulation of points - his fault.
He works in same town as his DC 170 miles away and he comes home via train and every other weekend brings his DC on two buses and a train and I do a 70 mile round trip Fri and Sun to collect them from the station (saving a third train and v tired DC).
Obviously this has cost him a fortune and at the other end he puts DC in a taxi home from train station.
OH ex is moving house some distance from where she is now and OH has said he will pay the same amount as before for the taxi (until he gets licence back) but can she make up the remainder (she doesn't drive) which she has refused to do saying that it's his fault he lost his licence (true) but she is choosing to move.
For 5 yrs OH drove over 600 miles each way every other weekend to have DC.
Who is BU?