Yes it's unprofessional. Depending on the rules of your office, it may even be a fire-able offense.
But only IF you're caught.
Honestly, if anyone's temperament could get readjusted by a good porking, it's yours. So why don't you take a play from the liberal playbook & go and get your **** wet. It'll be good for you, good for us, & while it'll probably be the stuff of nightmare's for her- SOMEONE needs to take one for the team, why not her?
"The Rich are there to take all of the money & pay none of the taxes, the middle class is there to do all the work and pay all the taxes, and the poor are there to scare the **** out of the middle class." -George Carlin