That sounds like you're saying the supervisor didn't do anything wrong, but rather that your coworkers took a reasonable gesture the wrong way? If so, that doesn't really jive with "One day, one of my supervisors jumped to my defense at a team event, in an awkward display of sexism"
I'm really not trying to be confrontational, just trying to understand. Is it that the "jumped to defense" thing was clearly sexist? Not asking for a direct quote, but what was the basis of the defense...something gender related, or the high quality of your work, or something else?