She failed.

She had pissed into her panties.

Not much, just a few hot dribbles, enough to drench the crotch other nylon panties, make the insides of her thighs wet.

Feeling her face burn with embarrassment, Peggy had frozen in her seat.

The piss was hot on her inner thighs. Her eyes had closed as she felt a strange tremor passing about her crotch, and then something happened that sent ripples of delicious pleasure up and down her flesh. She had to press her knuckles into her mouth to keep from screaming, it felt so good. It was only later that Peggy realized she had experienced an orgasm for the first time. But when it happened all she could do was sit there stiffly, blushing furiously, hoping desperately no one noted her. The orgasm had been very powerful, so powerful it squeezed the lips of her young cunt and held back the threatened flood of pus. The unexpected orgasm was the only thing that stopped her from pissing all over herself.

Fortunately she had not wet her dress, and the test was hcr last class of the day. She had rushed home, burst through the house and practically run to her room. She had stripped her wet panties off, putting on a fresh pair. She then stared at her worn panties on the bed, and felt the compulsion to hold them against her face. Rubbing the piss-wet crotch about her cheeks and chin, Peggy felt very strange things happening to her body and mind. Her cunt twitched and sucked inward, her clit starting to throb again, and she wondered if she would feel that delicious pleasure once more. But something stopped it from happening.

She had felt ashamed of herself that day, regarding the incident as something wicked, something not to be done.