annice,
you definately did the RIGHT thing!!! i know how hurt you felt with your sister making fun of the situation and all, but in the end, she'll realize what a complete ass she made of herself and appreciate you taking on her responsiblity...
never under-estimate your judgements, because you could have just saved your sister's life (or sisters' lives!)... and thank goodness you don't have to say, "what if i had taken those keys??"
you deserve a big ole hug ((((((annice)))))) and *snaps* to you for being the bigger person and modeling the right way to represent Phi Sig!
LITP~beth