Thank you for your question
My name is Clare
I shall do my best to help you but I need some further information first
When will your youngest turn 18?
Your ex cannot take court action at all.
Her only option if no agreement is reached is the CMS assessment which will end when each child finishes secondary education.
After that time only the children themselves could take court action if you did not help support them - and they would have to show that their income form all sources (including a part time job) did not match their essential living costs
Payment would be made directly to the child in question
I hope that this is of assistance - please ask if you need further details