She tells Emma she needs to pee

Hannah needed to pee like crazy, but she figured she could hold it for a few more minutes at first. That changed when Emma returned. She had brought a huge vibrator with her, the one with the big round white head. A Hitachi it was called. Hannah trembled in anxious anticipation. The drinking game had finished, some people had already put on their jackets, but they stayed around for this final show. Emma sidled up to her and turned the vibrator on.

"Emma wait!"

"Oh I don't think so." Emma laughed.

"No, seriously. I have to pee really really bad!"

"Is that so?"

Emma slowly ran the vibrator up along her inner thigh. Hannah gulped. That stimulation alone drove her wild already. Everyone was staring at her now and she was so so horny now. But, she was about to pee herself already and there was no way she could contain herself if Emma used that vibrator on her. She protested again. Emma moved the toy along her other leg in response. Hannah trembled.

"Emma... I'm not kidding! I gotta pee so bad!"

"Hmmm I don't think this would take long."

Alissa put down a large old towel underneath her. Hannah look at the crowd, shaking and beet red. They could all see her tremble and now she had to beg to let her go pee, or they would see her piss herself. Emma ran the vibrator along her thighs again, slower and more purposeful this time. She did not stop at her upper thigh, but continued up to her clit. Hannah's eyes rolled back for a moment. That felt so good...

"Emma... I..."

"What's that? Speak up slut!"

"Can you please let me pee?"

"Hmmm, not convincing enough... sorry!"

Emma held the vibrator on her clit. Hannah's whole body tingled and she began to breathe heavily. Fuck. She was not going to last long.

"Ok, ok, ok. Please please please pleeeaaase can I go pee?"

Click. Emma turned the vibrator off.

"Oh alright then. Go ahead." She stepped back.

Hannah looked up, confused and still trembling. Everyone continued to stare. Did they expect her to pee in front of them? She could not hold it much longer, but she refused to do that. A few minutes passed by as everyone put on their shoes and Hannah was just hanging there, struggling. It did not help that her legs were slightly spread open. Oh no. It was coming. She looked to Alissa with panic eyes, but it was too late. She interrupted the flow a few times, but sure enough she drenched the towel beneath her. The boys made noises of disgust, and urged Emma that is was time to go anyway. Hannah could just about cry. She wanted to cover herself up so badly. They thought she was disgusting now, her legs wet with her own piss. At last Emma and Alissa came and untied her. To make matters worse, she was still basically on the verge of an orgasm and every touch brought her closer.

"Here, dry yourself off." Alissa handed her a different towel. "You still look a little woozy. If you're up for more you can come with us. It's not that kind of party but I'm sure you're welcome. And we'll find some time to... you know... finish the job."

Hannah dried herself off a little. Could she handle more? Or would she take this towel and just go? That would be the sensible thing, but she was not sure it was an option. Alissa noticed her hesitation and saw the opportunity to convince her further.

"It won't be as initimate as this, don't worry. Just come along and you'll get to keep the towel on. After a couple of drinks we'll get you dressesld and get you home. How's that?"

"Oh... uh... I guess that sounds... ok?" Hannah answeres timidly. She had just been so humiliated, walking around in a towel for a bit did not seem so bad. She was not thinking straight at all at this point, and Alissa made it sound safe enough. In the back of her mind, though, she realized this was an enormous risk. She did not even know what sort of party this was, or who would be there. Emma interjected.

"Oh if you aren't going, Imma need that towel back."

There's the catch. Either she played along, or they kick her out butt-naked again. Then she'd have nothing to hide behind and would probably still be seen. Hannah felt small between these two taller, imposing girls.