cool story bro
But really she just gets crap from others im sure and you were the release for her frustration. Its really good that you know better and just smile and let her get away with it in front of others. To me that shows your a better person then most. And of course you and her know the truth to the matter so its all good.
And at least she has enough guts to go to the track with you, heck most guys I know that talk crap wont go to the track and put their pride where their mouth is.