I think the lesson here is.... just not let silly trivial stuff get under your skin.
At the end of the day, you weren't harmed in any way. While there is only one truth, there are many many interpretions of the truth, and to be honest, "your feelings" is usually just your interpretation of the truth. Other interpretations may exist, and many more interpretations are possible if you look for them.
Give her the benefit of the doubt, and move on. Be gracious. Be above all that.
Life's too short to waste it away fighting over trivial crap like you're on Real Housewives. They get paid to have all that drama. You don't. ;-)