Masturbation.

She could no longer control herself. The light stimulation coupled with the **** public nudity made her too aroused to stop herself from fondling herself with her one free arm. As the girl wrestled her arm free, she only absentmindedly played along. She slipped her slim finger in between her lips. As soon as it rubbed over her clit, the sensation was overwhelming. It was so sensitive!

Even so, she wanted to be at least a little subtle. She did not dare to make eye contact with the small crowd below and luckily the potted plant on the balcony somewhat obscured the gentle motions of her hand. Regardless, she could hear the boys laughing and telling each other how lucky they were, she could feel their eyes on her perky breasts, fully exposed. She had never been seen naked by two people at once, let alone masturbating in front of six.

As she continued to rub herself, she began breathing heavier and heavier. It would not take her long to orgasm under these conditions, but it would be immediately obvious what she was doing when she came. The girl next to her had not even seemed to notice. On the one hand, this was good, on the other, she would free her, and then what?

Before Hannah could orgasm, planned or not, the girl seemed to have cracked open the window just a little bit further.

"I got it!" She exclaimed, "let's pull now!"

Hannah's hand froze in place, her fingers wet and sticky. She had to pay attention now. She could probably pull her arm free now, but she would still be locked out and naked among these strangers. What would happen then? Hannah guessed she would find out soon enough.