Betrayed(1984)

Special training for young girls... Carla knew all about it... She had been there once herself. Now it was time to teach her naughty niece, Lisa, the ropes, literally. Carla arranged the set up to look like they were both being so Lisa would never suspect her. After they were caught and then separated, Carla is released to go home. However, just the thought of her niece being punished makes her excited that she has to return to the training center to see Lisa beg. Watch as Carla herself gets caught, and is put through a montage of B&D with Lisa.