A NEW COUNT DOWN

My weight loss and maintenance endeavors and focus have taken a back seat to my daughter's relentless pursuit of having me cosign a car for her. This is almost a 24/7 argument. I am waiting for the phone to start ringing this morning when she gets up. It continued until late last night with her crying about it. She fluctuates between rage and veiled threats down to begging and groveling. I don't know what it will take to convince her I am absolutely not doing this and what a horrible idea it is. She is stubborn and won't give up.
I am going out of town to a huge family reunion that she is refusing to go to. I told her a year ago when this was being planned that if she didn't go, she should not expect a heck of a lot from me. I was going to buy her some back to school clothes but that isn't helping either. She is sort of holding this cosign thing over my head, like if I go ahead and sign it, she will go, but that isn't working either.
I have worked out this week and eaten right. Don't get me wrong. All this stress is not driving me to eat and exercise. It is emotionally draining and depressing that I have this spoiled daughter who has no gratitude for anything I do for her. Whatever I do never seems to be enough. I have explained to her that her immaturity in dealing with these issues just further reflect that she is not ready for this responsibility and she would have to work 40 hours a week at school to pay for the car. But she refuses to see that and just insists I just don't want her to have a car and be happy.
Yup. That is what the past 19 years were about. I have only wanted her to be unhappy and miserable. Geez.
Will this kid ever mature past the leve of a nine year old? I think it is going to be along time before I figure that one out.