The sadistic trainer Catherine is back with another client. This time Liz has hired her to help strengthen her core. Catherine emphatically tells Liz to take position on the stretch ball. Liz apprehensively leans back as Catherine starts the training session. Catherine runs her long nails along Liz's stomach and Liz freaks out. Catherine demands that Liz toughens up as she sticks her finger deep inside her belly button. Liz holds on for dear life as Catherine continues her training. Catherine sticks a feather and paintbrush inside her belly button along with her nails. For extra lubrication...

The sadistic trainer Catherine is back with another client. This time Liz has hired her to help strengthen her core. Catherine emphatically tells Liz to take position on the stretch ball. Liz apprehensively leans back as Catherine starts the training session. Catherine runs her long nails along Liz's stomach and Liz freaks out. Catherine demands that Liz toughens up as she sticks her finger deep inside her belly button. Liz holds on for dear life as Catherine continues her training. Catherine sticks a feather and paintbrush inside her belly button along with her nails. For extra lubrication she licks inside Liz's belly button which really catches her off guard. She also runs her nails all over Liz's stomach and sides periodically. Surprisingly, Liz stays on the ball very well. But is apparent that she is in pure agony. Her laughter and screams fill the room while her sadistic trainer carries on. Catherine brings out the flosser next and uses it inside Liz's navel. Liz impressively maintains her balance, but she is in breathless fits of silent laughter. She makes some very weird and awkward noises while barely being able to breathe. Catherine doesn't care and continues having her way with Liz's belly button.