Not Quite

Pansy found a place to shower then dressed and headed for her first class. It was advanced potions with Professor Slughorn.

She went to class and took her seat. She saw Romilda Vane come in. Romilda looked ashamed and was glancing at the floor. More students came in. Last to come in was Daphne Greengrass. Pansy rolled her eyes. Daphne with her huge lips and mouth in the near constant o-shape. Something in the back of Pansy's mind seemed to think that Daphne was not always like that, but before she could think more, Slughorn came in.

Daphne walked up to the front of the class and knelt, and the old professor dropped his trousers, and Daphne went down on him. The other students shook their heads at this pathetic display, except for Harry Potter who had a strange smirk on his face.

"Miss Parkinson," said Professor Slughorn, who was still being sucked off. "Will you please come up here and change this nice cup of tea into a cup of butter beer?"

"Why something that simple?" asked Pansy as she walked up to the professor's table and saw the cup of hot tea."

"Because we are going to keep changing the liquid until we come up with a powerful potion." He put his hand on the back of Daphne's head and shoved her head forward.

Pansy took out her wand. She remembered the last time she used magic and wet herself in Defense Against the Dark Arts class, but she was convinced this would not happen again. She said the spell and flourished her wand. "Oh no, not again," she said between clenched teeth as she clenched her thighs in a vain attempt to stop wetting herself, but it did not work. Hot piss flooded through her panties, down her thighs and into her socks as the class, especially the non-Slytherin's laughed. After her bladder was empty, Pansy fled the classroom in humiliation.