i've heard that line before, i'm 18 and can do what i want.
first thing you can do is stop paying for the cell phone.
i know she is going to school so she needs the car.
if the only way she will finish school is by driving, then stop paying for the cell.
it is not a necessity.
she can get a part time job to pay that bill.
once she gets a part time job, start charging her rent.
if she says she is 18 and can do what she wants, then she is old enough to pay for the room and board.
many young people think once they are 18 they are allowed to do whatever they want. until they become more responsible and cover their own personal needs, would i not give them anymore money to cover the 'fun' things in life.
kids that age aren't interested in learning how to take care of themselves.
most usually start to do better when they are the ones that have to pay bills.
then they realize things in life aren't free.
i know this is tough for youse guys.
hang in there and decide together what you will do and then stick to it.
i suggest the cell phone is something she would need to pay for herself.