Bor,
Pay the fines yourself. It's only $1600, get yourself another job, there are plenty of temp jobs over the holidays, and just pay off the shit.
Don't turn a relationship into a race to the bottom over what is really a tiny sum of money It's only money after all.
In 10 years, you'll both have changed, and if you let this pass, your relationship might be good. If you turn in your bro it never will.
Keep in mind you're also asking a roid board for real life advice. lol.