At least sign off with an artistic mark!

You are about to continue onwards but come to a screeching halt. This needs a little bit of artistic pizzazz. To refrain from doing so would be malpractice.

You circle back and pass by like a small, hurricane, leaving a dainty little mark on one of her ass cheeks with a few licks of paint: it’s a little heartshape, painted on her wonderfully curvey posterior. You slap on the final coat of paint, toss away your brush and bucket, and deliver a firm slap to the other cheek for fairness, before continuing on your path.

When time resumes the guard suddenly lets out a little yelp from the slap and grabs at her posterior, before feeling the wet paint from her new decoration and craning over to get a look at what’s there. She is momentarily so confused and distracted, she forgets to do an adequate job covering her naughty bits, as she stammers “wh- what’s going on?!”