I don't understand why the dad would have to be taken to court to pay half of the bill, don't you have insurance on your child? He should be on your insurance or you should use his child support to cover the costs of treatment.
Why doesn't his child support cover it and why doesn't this child have insurance. If he is covered by insurance then therapy should be covered and his co-pay should be very very low. Our co-pay was only about $25 each visit.
So even if dad does have to pay half you are still responsible for the entire bill then you have to get your money back from dad. The doc will not keep seeing kiddo if dad does not pay. So this won't work. No matter what the court order says YOU have to pay the bill then go after dad to pay you back.
I got a lot of this with my child care center. I had one mom refuse to take her child home because I was owed a full weeks child care. She argued with me that she didn't have to pay me and that "I" had to chase down the dead beat dad to get "my" money. As far as "I" was concerned "I" didn't have any sort of agreement with anyone but this mom. She was responsible for the bill, no one else signed any paperwork with me, no one else brought that child in, no one else was responsible except the mom bringing the child.
I nearly had to call the police to have her removed from my property. She absolutely believed "I" had to accept her child even though money was owed. I did not.
Same with you. If hubby doesn't pay his part it won't matter what is on the court order, you are the responsible party. So if he doesn't pay you have to pay the full bill then get your money from dad.
I hope you and dad can work this out and that the financial part will work out too. It's hard when you have problems like this.