I understand the loan process completely. She obtained a student loan for the fall/winter terms. They divided the loan in half and half was made avaiable to her during each term. She was suppose to save the leftovers which was a couple thousand each term for spring/summer but spent it. She does work but has no self control.
Come down hard on her now and maybe she will change. Otherwise, get comfy for the long haul. Good luck. 
I hope that your daughters can grow up and appreciate all that you have given them. You have to help them see the error of their ways though, not continue to indulge them. I know that is easier typed then done 


It seems your oldest DD has it backwards, she should be kissing your butt not kicking it. 