Seriously - get the security video. Lucky for you, this occurred somewhere where there will be video, so that it's not just her word against yours. Sounds like she's been making up tons of BS so it would be very good for you to have the tape to defend yourself.
Then just go back to not giving them any attention at all. They're SO not worth your time or energy.
BTW - what did your daughter think of you calling her that?
