For tomorrow Kate was a little late and she had to take a turn of the girls in Svetlana’s office. Having seen enough of the others, standing on the couch on all fours, she calmly reacted to what others see as they pumped it up with water. With several of the girls present, she was already familiar. Understanding that they are all on an equal footing, except, perhaps, Christina, who was pumped much stronger than the others, helped her to relax without constraint.

This time she decided to prepare herself diligently. And freeing herself from the water, she squatted down and began to reveal herself. Having reached the limit, she did not get up, but began to wait, since no one hurried her. When she felt that her ass was ready to continue, she began to slowly and carefully turn the expander ring further. With all her strength, trying to relax her muscles and moaning from tension, she revealed herself more and more.

Reaching a new limit, she stopped. Squatting, closing her eyes and breathing heavily, she held her hands to the table next to her and waited for her muscles to adapt and allow her to stand. We had to wait quite a long time. But when she did get up hard, still holding the table, and looked at Svetlana, waiting for an order to present her ass for an inspection, she only nodded approvingly.

Petr Sergeevich was not in the office. But the box was on the table, like yesterday. Katya's hands themselves stretched toward her for her new smooth little fat vibrating and pulsating friend. Now she knows how to handle this thing and can pamper herself until Peter Sergeevich comes!

But there was no yesterday device in the box. There was something in it that resembled it only remotely: the panties were now made of thick fabric with a strap, the clitoral stimulator bar bent and received the tip covered with soft plastic fibers, and most importantly - the bump itself! Yesterday the lump was thick, smooth and of small length. This same ...

Katya stood thoughtfully and with both hands held a long and thick elongated object, the entire surface of which was littered with large semicircular protrusions. “Isn't Peter Pyotr going to shove it in me?” Thought Katya with horror. This weighty gnarled thing was terrible, even just holding it in your hands! And if she also will move?

- Hello! - Petr Sergeevich greeted her when he entered the office.

- Hello! What is it?

- It? A new model of the device that we are currently developing.

- What do you mean? Do you want to shove that horror into me? - Katie's eyes widened and her voice trembled.

- Naturally. - Peter Sergeevich answered calmly. “I will insert this part of the device into your back hole and we will explore the effect of its operation.”

He pointed to a device standing next to the box, on which lay a bundle of wires ending with white round sensors:

- But this device will help us fix the reactions of your body.

- Are you kidding?

- Not at all. Calm down please.

- How can you calm down? This is crazy! It's impossible!

- Quite possible. You will cope, do not be afraid ...

- Not! It is impossible! I can not agree to this! You what?

- Katyusha, I understand your concerns. I assure you, everything will be fine. - Peter Sergeevich raised his voice. - And now let's stop this dispute and sit in a chair!

- I will not do it! Not! - Katya was on the verge of hysteria.

- Well, so I will help you.

Pyotr Sergeevich took a cell phone out of his pocket:

- Semyon? Greetings, this is Peter Sergeevich. Please come to me again, I need your help again.

Then he looked again at Katya:

- Katyusha, please sit in the chair! You still have no choice!

- I will not do it! And you will not force me!

- We'll see...

A minute later the door opened and a guard entered, usually sitting at the entrance:

- The strike? - Grinning, he asked Peter Sergeevich.

- Well yes. - He smiled in response. - Young green! Help me ...

Together they grabbed Kate by the arms.

- Not! - she screamed and began to fight back.

Two strong men easily pulled the girl to the chair and sat on it. Katya squirmed and kicked, but her hands quickly secured the straps on the armrests. And then the men caught her hopping legs and also fixed them on stands.

- Simeon, thank you. - Thanked the assistant Peter Sergeevich.

- Not at all, always happy to help! - He smiled and leisurely retired.

Kate continued to fight on the chair:

- I disagree! Immediately let me go! I will not do it!

- Katyusha, as I said, you have no choice. I understand your condition, but now you'd better calm down and tune in to work!

Peter Sergeevich returned to the table and pulled him closer to the chair. Kate stopped and began to watch him. He took the sensors and began to attach them to Katya's body: one for the pubis, the second between the breasts, two more for the forehead and two for the temples. He turned on the device:

- We begin to monitor your reactions. Try to relax.

The hands of Peter Sergeevich squeezed Katya’s breasts and began to massage them. His strong warm palms gently crushed her knolls, squeezing them very weakly, then much stronger. His fingers teased her nipples, then slightly twisting them, then squeezing and pulling a little. Katya’s indignation and protest weakened, giving way to relaxation and pleasure. She closed her eyes and smiled slightly: it was unexpectedly gentle and very pleasant! She was already accustomed to obey this man and now she even liked how he caresses her, strapped to the chair. Her nipples hardened in his experienced hands, and her pussy was wetted.

Peter Sergeevich pressed some button on the device:

- Farther...

With one hand he continued to caress her gentle knolls, and with the other he put it on her pussy and began to tease with her fingers. Katya breathed more often - he knows how to do it well! A spark of pleasure flared inside her ...

Suddenly the caress stopped.

- We continue. - Pyotr Sergeevich said softly and again pressed the button on the device.

He went to Katina crotch and began to unwind the extender, loosening the tension of the muscles. Katya froze and trembled with relief. A weak moan escaped her lips. How much, all the same, easier when your ass is not bursting!

But when Pyotr Sergeevich took his creepy device from the table, she became agitated again:

- Do not! You are welcome! I can not! Please do not do this!

- You can handle it! - He answered her encouragingly.

He separated the bumpy shell with the curved bar sticking out of its base from the panties and began to lubricate it. Then he took it with both hands and brought the crotch to Katina:

“You have no choice, so it is in your interest to help me!”

Katya squeezed her eyes in horror and waited, trying to relax. This thing touched her uncovered hole ... Here she starts to dive into it, slowly stretching ...

The girl's trained anus opened up without significant resistance, until the first protrusions rested against it. Peter Sergeevich for a second stopped the dive, and then pressed harder. The muscular ring stretched harder and gradually began to wrap around the bumps of the protrusions. The girl moaned from the strain.

When Kate felt the semicircular projections enter her, she moaned. Prior to that, she took only smooth objects: members, expander, lump. Now it was something that was very thick and very uneven!

Gradually, the bumpy barrel of the device plunged into the hole completely. Peter Sergeevich went to the recorder to press the button again, to mark the moment of change of stimulation. Anyway, a stretched hole would not have been able to push the object that filled it. Then he came back and pressed it with one hand, taking the control panel with the second:

- We continue the test ...

The villi pressed against the clitoris began to move. Katya's body trembled weakly. She was very much bursting from the inside ...