Headmistress' Favorite Sport Part 9

They made lick their pussies, their boots and their asses and the broke her ass in with their double-ended strap-ons. They didn't tie her up in any way, effectively proving to her what a slave-slut she really was. Finally, just before dawn, they fucked her pussy, bringing her to a series of glorious orgasms. They had made her theirs beyond any doubt. Gina had never felt like that before and knew she would never even want to escape the cruel sisters.

The twins had no classes the next day, but Gina did. So they dressed her and sent her off to school. They shaved her pussy and inserted a butt plug in her ass and a pair of Ben-wa balls in her pussy, before making her wear a thin full-body suit made of black rubber. No one could see she was dressed in rubber when she wore her regular clothes over the suit, but Gina would feel it all day as she was constantly reminded of her new status.

Within a month Gina dropped out. She, who had fought so hard to get a scholarship, lost her ability to concentrate on anything but her new status as a slave. Her every waking thought revolved around the twins and how to please them. She also lost the part-time job she had on the side and was finally evicted from her small apartment. Just as the twins had planned she wound up in their dungeon. Gina proved to have an immense capacity and craving for pain as well as a deep desire to be humiliated. This triggered Jocelyn in a big way and most nights Gina spent screaming in agony. Jocelyn used Gina to find out for how long she could keep someone in constant pain. She fitted her with all the needles and electrodes her body would hold and devised a strategy whereby the pain would constantly shift from one part of her body to the next, so that she would never grow accustomed to the pain. After five days Jocelyn shut off the machine when it looked like Gina would die from exhaustion and after that session Gina was reduced to tremors of fear mixed with lust whenever Jocelyn got near her.

She ended up as a special kind dog girl.