Note: This story was dynamically reformatted for online reading convenience. Day eighteen. Ivana had been in the cybersex prison for several years. She was used to the concrete cell, the lack of amenities, and the sessions on the game grids, with transducers, wires, and sensors. What she had not anticipated was that she might be taken by one of the female guards as a submissive slave girl. Sam was a senior guard at the facility. Sam began to feel "special needs" and requested an inmate to be assigned to her private quarters. Ivana was chosen for the duty. The orders were cut at headquarters. Ivana knew that her time was up on the game grid as the tubes in her vagina and rectum emptied and the matrons begin the process of disconnecting her from the terminal connected to the mainframe computer. She anticipated the usual routine and being returned to her cell. But there was change. As the Virtual Reality headset was removed she saw Sam with two other guards. Sam told Ivana or her new situation. "You are to be assigned to me personally," Sam instructed Ivana. "Yes, Mistress," she replied, lowering her head obediently. Ivana had no idea what this would mean. She had been able to exchange small bits of information with the other inmates, surreptitiously, from time to time. Even this was dangerous business. She knew a little about the guards. Some were more sadistic than others, some more gentle. But she had never encountered this before. "Since you will be assigned to private quarters, you will have to have a control and tracking device implanted," Sam explained. "Yes, Mistress," Ivana replied, not lifting her head and focusing on Sam's spit-shined boots. Ivana was sure that she would be shining those same boots in the very near future. Ivana's hands were cuffed behind her back and the four, Ivana, Sam, and two burly Neanderthal guards, made their way to a medical suite. Ivana was put on an OBY-GYN table and her legs were spread painfully apart. Her pussy lips spread as the folds of her vulva were pulled aside by parted inner thighs. She felt the cool air of the room circulate against her clitoris and labia majora. She shifted her upper body to accommodate the handcuffs pressing against the small of her back. The three chatted about sports and weather for a while. Then a physician entered with white smock and stethoscope. He washed his hands and motioned Sam to push over a stainless steel cart. He rubbed KY Jelly all over Ivana's privates and deep into her vagina. The lubricant had a chilling sensation and Ivana's pert little clit puckered while her teats stood at attention. Nothing could have prepared her for the next event. The doctor began inserting a tube, a large catheter, into Ivana's vagina. About half way in, he twisted it to press against her cervix. Ivana gasped. She tried to relax. Her sphincter muscles tightened involuntarily as did her pubococcygeal muscles. She expected the doctor to warn her to relax, but he didn't say a word. He continued to press until her cervix expanded and the catheter slipped deeply into her womb. Then he spoke to Sam. "What we are going to do is insert the 'egg' into her uterus," the doctor explained to Sam. "This is a geometric revolution of an Oval of Cassini. It has specific arithmetic ratios and aspects. I won't bore you with the details. Let me cut to the core and describe what will happen." The doctor inserted the "egg" into the wide end of the catheter, which expanded to take the object and propelled it forward with an undulation akin to peristaltic motion or the pumping of sperm through the urethra. It moved rapidly until it reached the cervix, and then paused as the wicked catheter tube inflated and begin to force the object into Ivana. She screamed more from fear and fright than pain. This was an "auto-insertion" device. There would be no coaxing for Ivana to relax. The unspeakable pain and pressure built within her. She struggled to stay conscious, fully aware that losing consciousness was grounds for punishment. Screaming again she passed out as the bulb entered her sensitive, innermost Holy of Holies. Sam was a bit concerned but the doctor seemed unperturbed and continued with his matter-of-fact lecture. "This device has an iron ball in it, located off-center. With a suitably strong magnetic field, it can be made to rotate, vibrate, oscillate, or heat up. About the door to your quarters a field will be activated. Should Ivana try to leave without it being deactivated, the 'egg' in her uterus will be activated and she will be subjected to terrible pain and cramping. She will have to return to the room for relief." Ivana returned to consciousness to hear the last of the explanation. She was relieved that she was not being punished for losing consciousness. The doctor concluded his explanation. "This device can be used to track the whereabouts of this inmate as well. You can find her on the map anytime you want to. It can also be used to motivate her. During her period this device can be used to harshly scrape the lining of her womb, causing extreme pain and suffering, for your enjoyment. And it is located inside her uterus. The flat end of the egg pointing downwards, so there is no way she can expel it. Do you have any questions?" "Yes," Sam replied, "one quick question. How is it removed for service?" "Ah," the doctor exclaimed, "good question. It is inverted by a suitable magnetic field. A very strong field only found in the treatment room, by the way. Then, with the pointed end downwards, it is 'sucked' by magnetic flux from her." Sam and the doctor smiled. Ivana moaned at the though. She was terribly sore and hurting inside. The doctor checked a few gauges and meters and then pulled out the catheter from Ivana, leaving the "egg" implanted in her. Sam made sure that the handcuffs were painfully tight on Ivana's wrists before bringing her back to her quarters. Once inside Sam collared Ivana with a steel collar and chain. The girl was limited to just part of the bedroom and the bathroom. Then Sam began to play. "A girl will present her cheeks for slapping," Sam commanded. Ivana didn't hesitate to bend over. "Your face, girl," Sam corrected her. Then she slapped Ivana hard on one cheek. Tears swelled up in her eyes. Present the other cheek now girl. Ivana obliged, being slapped even harder. Then Sam gave her the rules. Ivana would wear a butt plug at all times she was not on the game grids. She had one half hour each morning in the bathroom and no more. There she would have to do all of her ablutions and perform whatever bodily functions were needed. At any other time she would have to beg permission from Sam. Sam presented Ivana with her butt plug. The girl gasped. It was huge. Ivana's pussy was still covered with KY Jelly. The doctor made no attempt to clean her up and she wasn't given permission either. It would turn out that Ivana would only be allowed to touch her privates or anus in the presence of Sam, with the exception of her half hour in the bathroom. While there was no lock on the bathroom door, Ivana loved the privacy of her toilet. She learned to urinate, defecate, wash, towel, and masturbate. There was a severe penalty for not being finished in the bathroom in the allotted time. There were penalties for any misbehavior. "I know that this plug is larger than the devices used on the game grid, girl," Sam said. "So this first time I will be patient. Bend over and let me insert it." Ivana bent over. Her hands were cuffed so there was no way that she could spread her buttocks apart. Sam lubricated the butt plug with KY Jelly from Ivana's pussy. She moaned as Sam stroked her engorged, tumescent vulva. Sam eased the coke-bottle shaped device in. The neck went in a few inches and Ivana's sphincters tightened. Sam continued to push. When it was partially in she had Ivana inhale and hold her breath as long as she could. Then totally exhale. As soon as Sam ensured that Ivana's lungs were totally empty she shoved the plug in to its stricture. Ivana screamed in pain and twisted her cuffed wrists. Sam smiled. Ivana was plugged. Sam spend the rest of the evening getting Ivana fed and showing her various toys. Sam had her food delivered from the prison dining facility and a huge bowl of oatmeal mixed with some nondescript substance. Sam used her fingers to put the food into Ivana's mouth. Ivana had to lick and suck Sam's fingers. Then Sam showed Ivana the whip and the electric goad. "Where do you think this goad goes, Ivana?" Sam asked. Ivana's eyes dilated as she shook her head. "It goes in there," Sam explained, slapping Ivana's pussy hard. "We will have a little trial to see how you like it!" Sam eased the device in. The KY Jelly would insulate the total shock. Sam pressed the on key and Ivana convulsed with pain. Sam smiled. "I could do this for hours!" Ivana was crying. Sam licked the salty tears from her hot, pink cheeks. Then it was time for bed. They both slept in the same bed. Ivana was cuffed hand and foot. Sam was restless and from time to time would rub Ivana's naked body and wiggle her butt plug. Every so often she would jerk it partway out and shove it in again. Ivana was sore. The night lasted forever. Ivana could not be put on the game grid until her bowels were emptied. Sam would ensure that she had her enemas. Sam delighted in mixing a huge measure of salt with the hot water. After pumping two quarts into Ivana, Sam pushed in an inflatable butt plug and pumped it up. Ivana was used to the medical personnel pumping and flushing. She was not accustomed to being filled and forced to hold the fluid. After a miserable half hour, Sam deflated the butt plug to half way. It would not be ejected by anal pressure alone, but would require manual assistance. Then Sam put the collar on Ivana's neck with the chain, uncuffed her wrists, but not her feet, and let her use the bathroom.Ivana "Since this is your first day, I will give you an extra ten minutes. It is always hard on a girl pulling the plug from her derriere. It is half-deflated, so you won't have too much trouble. Don't let it slide back and strain you bowels at the same time." Sam's explanation seemed to take forever. Once inside the bathroom, Ivana lifted the toilet lid and seat and pulled the plug. She couldn't believe that she could hurt herself so much and enjoy it at the same time. Her bowels emptied in a torrent. There was considerable splattering, but this bathroom had toilet paper. It was muchly improved over her start, concrete cell. "We are going to really have fun tonight, girl," Sam implied. "I have some carbonated soft drinks for you. You will get to hold your urine until tomorrow morning. A girl had better not make a mess!" Sam had something to enjoy thinking about all day long at work. The idea of a girl suffering to hold her urine amused her greatly.