Not sure which group to post this in...

Child support. My son's dad seems to think it's aka a "college fund." I was talking to him about our son getting braces and the out-of-pocket cost. He said to me, I shit you not, "Just take out of his college fund." I was wondering what the hell he was talking about, then he said the words "all the child support I give you." Isn't that money to help with daily living? Because I use it! I don't sit on it! It's called daycare fees and clothes! 😂😂 I ended the conversion there because I didn't want to argue...but am I wrong?