Tough time in chemistry

Lauren meekly tried to do the chemistry assignment, though it was incredibly difficult to focus with her bare legs and thong clad ass hanging out behind her! She heard the snickering voices, and felt every flicker and jiggle of her backside as she moved. She felt so helplessly exposed, her knees rattled and her hands shook.

Just then, Abby walked away from her station. She winked at the other girls then headed Lauren's way. The class saw this and watched eagerly. Abby waited until Lauren was just about to poor a chemical and brushed past, rubbing her against Lauren's backside.

"AHH!" Lauren loudly squealed as she poured the chemical all over her shirt. The teacher jerked around.

"Lauren!" He exclaimed. "More disruptions?!"

"She bumped into me!" Lauren defended, pointing at Abbey.

"It's not my fault your butt sticks out so far!" Abby defended with a grin...