That wasn't really all that bitchy of her.
That wasn't a "whack attack"
She made a very good, valid point, and IMO she wasn't being bitchy.
She was trying to give you information, because your 'joke' wasn't cool.

Next time, instead of getting all flustered, just accept the fact that you were wrong, and don't try to make it seem like someone else was.

I really don't believe she was the one in the wrong, here..
/end.