Can a mother stop paying child support to the father after the child has turned 18 and attending Collage full time?

I would like to know as the mother states that she is stopping to pay child supprt for my 18 year old son that attends Collage full time. He still need Us to support him though Collage. Thank for your time on getting back to me.

It really depends on what the child support order says. You do have one of those, right?