Workout of her posterior!

Its time for Linda's excise session! She mounts the treadmill and begins a slow stepping motion. Her instructor, Krystal needs to get the girl moving faster and work up a good sweat. She employs a generous amount of attention to Linda's backside raising the temperature and color of her posteriors as the session proceeds!
First its over her exercise shorts then on the bare bottom. The strap propels Linda to move the treadmill at a consistent and rapid rate. When Krystal leaves her to finish her workout, her bottom is sore and red and she is dripping with sweat.