Disclaimer: I don't own South Park. Never will.
-x-
Stan Marsh couldn't believe his eyes. His mouth hung open and his eyes widened, taking in the scene that unfolded before him with burning curiosity and surprise.
His sister was kissing a boy.
His sister was kissing a boy.
Shelley, the snaggle-toothed, greasy-haired, pimply faced teenage beast of Stan's sister was currently wrapped up in the arms of an equally ugly boy, their lips pursing against each other with growing intensity. Shelley's hands were buried in his hair, while his own gripped her waist.
The sight was sickening.
And yet so intriguing.
A slight nudge to his side and Stan was jarred from his thoughts, blinking rapidly and trying to erase the image from his mind as he turned to face his best friend. Kyle Broflovski's eyes were equally as wide, his own mouth partly open in shock.
"Dude... your sister..." he whispered, not daring to look back through the partly open door of Shelley's bedroom. "God damn that was disturbing..."
Stan nodded, stepping away from the door and straightening up. He'd seen enough. Besides, his sixteen-year-old sister needed her privacy, however greasy and disgusting it might be. The black-haired boy didn't want to think about what this encounter between Shelley and her guest might lead to, and yet...
...and yet, he couldn't help but envy her position as his gaze rested upon the snickering redhead still crouched behind the door, watching the display with equally - albeit secretly - envious eyes.