"Hey Jenn, I think I may have been adding a little bit of weight lately, do you mind if we go to the gym?"
"No, not at all Nikki" Jenn replys
"Great"
As the girls walk to the gym, you are rubbed constantly against each one of Nikki's butt cheeks. It is actually quite pleasant, considering the situation you are in. In fact, at times it VERY pleasant, depending on which part of you was experiancing most of the pressure.
Suddenly the darkness around you became much brighter, but your exictment was hampered quickly as you realized that Nikki was only changing into her gym clothes. The girls then walked out to the track.
First giving her butt cheeks a little clench, to be sure you were still there, Nikki began to run. And run. And run. She must have run at least 5 miles. You forgot, she was your school's best cross country runner. Anyway, as she ran, she began to sweat, which made your situation much much less comfortable. Although it could still be pleasant at times, it became much more unpleasant much more often. The smell and heat of her sweat made you want to pass out, but the pain from the increased speed that her butt cheeks were gliding at made fainting impossible. Instead of gently rubbing you as she was walking, they now felt like they were slapping your entire body.
Apparently, Nikki had felt like she had run enough, as the violent butt cheeks subsided. Soon, the light returned slightly, and you had a quick idea. Now that you and your environment were wet and sweaty, maybe there was a chance that you could slide out and escape!
Quicky, you begin to squirm between Nikki's butt. you had to work fast, or she would certainly figure out what you were trying to do, but for the present, she was apparently enjoying it, as you could hear slight moans from above.
Suddenly, your squirming was put to an end, as you shot down the middle of Nikki's crack and down the side of one of her legs and landed roughly on...