<human>: Can you provide a brief overview of the text?

I'm not sure where to start, but I'll keep this as short as possible.  

I was always a goody two shoes growing up, made straight As, never really got in trouble for anything.  

Immediately after graduating high school I moved 10 hours from home, got a job working at a school full-time. I took a year off waiting to start college so that I could get instate tuition. I then graduated college in 3.5 years, while working full-time and making a 3.8 GPA. I had to take out loans for every part of this, including extra money on top of tuition for books as I was making just enough to pay my bills.  

My younger brother has been the same way - works his ass off to pay his bills and joined the National Guard to make sure he'd be able to pay for college without being as in debt as I now am.  

My little sister, the baby of the family, has always been the one that gets away with anything (typical). She missed so many days in school and was failing so many of her classes that she spent Junior and Senior year in a secondary school for "problem" students...she scraped by and somehow will indeed be graduating.  I just learned that my parents are buying her a VW Beetle for her graduation. She doesn't plan to go to college.  

As I'm currently working 2 jobs and barely paying off my student loans, I can't help but be upset that my parents are about to drop a large chunk of money (which would greatly decrease the monthly interest on my student loans).  

I'm sure many people on here have dealt with a similar situation. Is it even worth talking to my parents about this? I know it will be an ordeal, but I can't help but feel as though I've been punished my whole life for doing things responsibly.
<bot>: Mom and Dad give little sister, who is incredibly irresponsible, anything she wants. I'm incredibly in debt from college and they are about to buy her a car. Not sure if it's worth the fight to bring up.