My best friend has a 9 yo who's above average in everything academically, she's involved in lots of School sports teams, the choir, school council ect. My friend has altered her career to do every school drop off and collection. Her ex has their DD one night EOW only - his choice. He never goes along to watch competitions or shows or asks how they have gone.
My BF has booked flights to her brothers wedding in May which will mean missing three days of school. Her ex is kicking off big time that he hasn't been consulted and saying he disagrees and that he's going to take her to court to prevent it. Naturally, he isn't prepared to take those days off work to do the school and activity runs so DD doesn't have to miss school 
My BF is nervous and considering not going in case she gets in trouble with school and the court. My opinion is - he isn't interested in her schooling the rest of the year, doesn't want to help himself - he should butt out. What do you think?