On Sandry's blouse

The test tube landed straight on Sandry's ample chest, the contents spilling over the white cotton and drenching it purple, then quickly fading to pink.

"Oh, no." Sandry gasped, realising what their formula did. As she, and the rest of the class, watched her blouse turned see-through, then holes started to appear all over it as the chemical soaked in and broke down the material. Unable to stop it and not having any time anyway, Sandry saw her blouse fall to pieces and drop from her body, leaving her in a barely-adequate light pink bra.

"No!" she exclaimed, ensuring that everyone was looking at her now as she crossed her arms over her generous chest and chubby belly. The class burst out laughing.

"Nice going, Sandry!" came a shout.

"Wanted to get something off your chest?" came another.

"Hey, her skirt's ripped, too!" someone announced from behind her, "She's got no knickers on!"

"Really?!"

"Let me see!"

"The little slut!"

Sandry released one arm from her chest, she grabbed a textbook from the desk and held it over her bare behind.

"No no no!" she wailed, "This can't be happening! I'm a good girl!"