She's not done

Stacey sits up, still thoroughly coated in your cum.

"Enjoying yourself you cumrag?" You say jokingly. Stacey clearly isn't offended though as she takes your still hard cock in her hand once again.

"Are you fucking kidding me? I'm loving every second." she says as she once again begins licking your tip, lapping away at her personal cum fountain.

You once again get hit with a spike of arousal as you realize the extent to which the marker has changed Stacey to love being your cumdump.

"I seriously feel like an addict, every second im swallowing your cum feels like heaven. Although the sweat and hair is starting to bother me, we should fix that." Stacey says, once again a little repulsed by your sweaty, hairy balls now that the writing on her chest has disappeared.

"Oh sure, let me jus-" You go to cross out the words SUPER SWEATY BALLS, and SUPER HAIRY BALLS, but Stacey stops you, and takes the marker for herself.

"So remember how when you crossed something out it completely went away?" Stacey asked as you nodded your head.

"I wonder if i can make something more powerful..." Stacey said as she underlined the word Cumslut and watched as it faded into her skin. Stacey half expected it to go away but she still felt her urge for cum.

"What happened?" You asked with a mix of worry and curiosity.

"So uh, I might've just made myself a permanent cumslut..." Stacey said, looking at your hard cock with a renewed hunger for her favorite nectar.

"Wait WHAT??" You should be concerned, but you felt your cock twitch with arousal.

"Welp, might as well even the playing field" Stacey said as she lifted the marker to your skin...