Ex and I have amicably split kid's expenses 50-50.

We have shared cost of before and after school care until now. This year the kids are getting the school bus straight home. This is saving us $700 per month.

However she has now said that she still needs to put them in before school care 2 days a week as she works 45mins away from home, and can't see them onto the bus.

She says that this is a kid cost so should be split 50-50 like other expenses. I say that she should pay herself as it has nothing to do with me that she works so far away.

Thoughts?