though i could rant all day about this, ill keep it fairly short. in one word, NO. you should not feel bad about this at all. i would not feel sorry for her one bit. she decided to break house arrest, get drunk, and drive. she deserves everything she gets. no one put her in this situation but herself. no one should feel sorry for her. she is the one that is at fault, she deserves to be punished, and you should want that to happen. it is in no way abnormal to feel happy when she gets punished, b/c that is some small form of retribution for what she did to you. eye for an eye all the way (well almost), although she doesnt have to live with lifelong problems from this incident.
if i were you, i would be laughing my @$$ off when she got sentanced and had to march out of the courtroom in shackles.