She goes naked, willingly

"You know what?", Jessica thought to herself, "that bitch thinks I'm an exhibitionist slut, she's gonna get an exhibitionist slut!"

Jessica remained absolutely peeved at what her classmates must still have thought of her all these years later. Then again, they weren't necessarily wrong... she had gotten into exhibitionism in the years since the incident, making sure to skinny dip and nude hike in all 50 states. So this wouldn't be such a radical choice for her, showing up to her reunion in nothing more than heels, jewelry, a hairdo, and makeup.

So, she made her mind up - she would be going naked. But she still pondered whether to tell/warn Mallory, or at the very least try to bury the hatchet with any problems between her and the rest of the student body.