My ex pays child maintenance in line with the CMO recommendations.
My DD has recently asked to go on a school trip which is several hundred pounds.
I have asked my ex for a contribution towards this as a one off, but he says he pays more than enough and won't make any further contribution to anything ever.
The only way he will help towards the school trip is if I cancel the CMO case and allow him to pay less money on a monthly basis.
Am I being unreasonable to think he should actually do both.
He has an extremely good job and a good amount of disposable income otherwise I wouldn't ask.
Every time I speak to him about money it turns into a huge argument and he calls me all number of names so I'd really like outside opinions as to whether I'm asking too much.