Absolutely he should have paid for the removal of the braces (or to even keep them on) - for his daughters sake!

exH 1 and I also paid for all of sds athletics and took him each week because his ex couldn't be arsed and sds would have missed out otherwise. It didn't matter to us because when that little tacker ran like the wind and came back with ribbons and a puffed out chest it would have been cheap at twice the price

And me? Well of course my ex cares for me (both of them do ), I care for them too, and I also do a great job as mother to their children.

I understand the ex might be a total cow, and it might be a PITA to have to pay for stuff but the end of the day being righteous doesn't make the children better off.