You know, I lurk here on this part of the board... fearfully! 'Cuz I have a feeling that I'm going to be facing some of the garbage you all are grappling with today. I hope to heck NOT, but jeez, I'm already dealing with some similar stuff, Nancy.
difficult child 1 had a checkup today at the dentist. So did the other two kids, who both had great reports from the dentist. But Mister-I'm-A-Teenage-Pain-In-My-Mom's-Big-Beehind has SIX, count them 1, 2, 3, 4, 5, 6 CAVITIES!!!! The dentist didn't tell him, so I had the pleasure of a major I-Told-You-So soapbox rant all the way home. The dentist was really upset, but all I could do was shrug my shoulders and tell him that some people need natural consequences to learn what's important in life. There's only so much I can do... he's almost 15. I made sure to point out to difficult child 1 the expense of these fillings and that it will mean that much less $$ I will have for anything HE wants to do.
He broke his glasses this summer, too. And guess who has to pay for them? HIM. They cost about $100 (and that's with the optometrist taking pity on him since she knew he'd have to pay for them with his own money, so she gave him a discount and worked out a way to get the new lenses for free so he just had to pay for the frames), and he still owes them $40. Yet another lesson-learned-the-hard-way for this kid.
I'm afraid this is a predictor for his future. But what else can we do with kids like this? We cringe to see them fail. But when they are intent on plowing forward with blinders on, or as in your case, biting the hand that feeds, there's folly in continuing the same old pattern of useless support. That's insanity, right? Repeating the same behavior with an expectation for a different result?
I'm with Nomad -- you and husband need to plan a big whoop-dee-doo weekend together... or maybe a whole WEEK-long celebration when she's finally out of the house and your hair. You've earned it in spades.
((Hugs))