Sally, determined to not let the extra attention disrupt her routine, got onto an exercise bike and began pedaling. She rode the machine at a relaxed pace for awhile. After a while, noticed the gym began to empty as the other patrons finished their own routines.
"Ah, good, some privacy at least, I can ramp it up now." She raised her butt off the bicycle seat and rode the machine hard, buttocks swaying left and right at a fast pace. Her leggings were now stretched and strained across her rear, making it even more see through than before, and her white g-string barely covering her crotch.
Oblivious to her, someone else in the gym was enjoying the view...
Public version also on DA: Sally's Workout (part 2) by lechono on DeviantArt