Her friends, having finished their studies, find her here naked.

Erica imagined those words almost too vividly, she could even hear them giggling in response.

"Wow, it's like she didn't hear us." Yes, they would say that, wouldn't they?

"She's too far gone now, she's gonna cum any second." They would say that too.

...

Wait...

Erica **** herself to stop and open her eyes (she was so engrossed in her... Activity... That she didn't realize she closed them), only to see, of course, her friends giggling, Lisa, Alicia, Carrie and Christa.

Like a spring, Erica's mind cleared away the cobwebs almost instantly as she bolted upright, covering her breasts and pussy as fast as her hands can, it didn't really even make much sense to do so in front of her own friends (who've seen this very scene countless times), it was just habit.

"Well, at least now I can sleep without feeling guilty," Lisa grinned "you did this all by yourself."

Erica didn't think she could blush any harder, Lisa was completely right, she'd stripped herself by herself, and she sat herself in the middle of the park, shamelessly masturbating for anyone to stumble upon her.

"I... I'm sorry," Erica squeaked, and it might have been her low voice, but the sound of her friends laughing was quite loud, almost too loud.

Lisa barely managed to compose herself long enough to say, "Wait, let's be fair girls. At least she knows when she's been naughty."

"I don't know, I don't think she should get off scot free just like that," Christa remarked foxily, the emphasis she put on the words 'get off' only made Erica squirm further.

"Well..." Lisa contemplated.