Seems like she took it as a normal no strings hookup to me. I don't see what the probo is...you got some likely needed p-tang, and she got a night off from her loser fiancé...win for everyone the way I see it. Sometimes at the end of the night it's just sex and wanting to be close to someone for 8 hrs...nothing more. Also, bars scenes are usually breeding grounds for hookups...kind of common sense.
BTW - I do believe it is poor taste to bring up that you make 6x the normal salary. Kind of makes you come off as a bit arrogant and dirt baggish, even if you didn't mean it.